Power factor calculation

we r doing our project in same concept ...we can calculate power factor using nielvis ah? and how it is possible?pls reply as asap..thanks in advance

This is a very open question, but in short, you need to measure the phase lead/lag between voltage and current (0° phase lag = Power Factor of 1, etc). Assuming you're using one phase ~120VAC, you'll need to drop the voltage down with a resistor divider, then sense the current using a low impedance (ex: .01Ω, .1Ω, etc) series current resistor... actual impedance is a function of the current you're pulling: you want the voltage across the resistor under maximum current to be close to (but less than) the maximum input voltage of the analog input channel. Then you'll need to plug these low voltage measurements into two channels on the Elvis board. After that, you'll need to acquire the data and then perform your calculations.
In short, yes, it is possible to measure power factor on the ELVIS platform. Please let us know if you have any specific questions.
-John Sullivan
Analog Engineer

Similar Messages

Calculate Impedance, Power Factor & Type Of Power In RLC Circuit

Good Evening
No suprises to what im looking to investigate today.
I have a initial circuit which contains a AC supply, Resistor and Inductor only, I must calculate the impedance, supply current, power factor & angle, and type of power that is consumed in the circuit.
I must then create a modified circuit in which i must improve the power factor to 0.95 and specify the value of capacitance required!
I must then calculate the impedance, supply current, power factor & angle and the type of power consumed in the circuit.
I have never really used multisim before, just want to make sure my calculations are correct as the values I have been given to work with are producing tedious amounts of impedance. My XL=24kOhm
I have tried to use the impedometer but not quiet sure how to wire it correctly. Same goes for the watt meter not sure how to wire the terminals for V and I.
Appreciate any help and advice I have provided some images of my initial circuit I have not specified the value of C as im not sure what it must be to give me a PF of 0.95.
Regards
Ps pardon the amatuer mistake forgot to add a ground (fool)
Carl
Attachments:
INITIAL.png ‏44 KB
MOD.png ‏44 KB

Hi Hass,
Here is an article on Calculating the Impedance in Multisim.
http://digital.ni.com/public.nsf/allkb/9F8D30235DE3EC0186257592006B23A2
Similarly, you can add Expression to Calculate the Power Factor or other circuit parameters.
Hope this helps!
Regards,
Chen_T
National Instruments

Power factor, reactive, active and apparent power

Good morning,
I have a VI that make some math calc and give me the power factor from the system, but when I'm trying to show it in a waveform graph I have some problems.
First I have to fix the scale: -1 to 1
Second that you all know if the values go high than 1 the value has to be negative -0.999 -0.98
How could I work on Y axis to change it when I'm trying to show a graph of power factor? I think about use property node to work on Y axis... but maybe have an easier way!
And also if someone know an easier way to calculate power factor,
Reactive, Active and Apparent power I would be glad if someone can help me on that!
Thanks

Hey Jeff,
This program was made in LabVIEW 7.1
I will upload the code but I will tell here more or less what it do.
You won't be able to run the problem because it's open a file that I have recorded with another program and save a new file.
To get real power (p) = I took the average of instantaneous power
P=V x I
Apparent power (S) = Vrms x Irms
Reactive power (Q) = SQRT (S^2 - P^2)
Power Factor = P/S
This is the math, the problem is I need to adjust the graph to power factor
and we know that power factor goes -1 to 1
How can I make LabVIEW understand if a value go high than 1 so it's negative? my problem is that!
I will make a second post to upload the other 2 VI's
Message Edited by EduU on 03-12-2010 06:12 AM
Attachments:
Conversor4V4I-A teste3.vi ‏119 KB
Le Dados Conv 4v4i S5 1 grafico.vi ‏236 KB
conv_hora.vi ‏17 KB

How do I creater a indicator to read power factor

The problem that I have is not that I can read power factor because our RTU gives me a analog input in numeric fomat for our power factor. I need to know if there is some sort of scaling or indicator ( such as a analog dial type gauge) that can be scaled to read power factor in the below format. We want to see Lag / Lead that mimics our mechanical analog meter at the power plant. Any suggestions?
-0.5
-0.6
-0.7
-0.8
-0.9
1.0
0.9
0.8
0.7
0.6
0.5

Why not just use the dial or guage in the Numeric Controls palette? You can change the scales easily enough to be a -1 to +1.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

How to plot power factor as a graph?

Well guys, I have an array with power factor values and I need to plot this in a graph.
My problem is because as you know, power factor has positive and negative values so when I plot I need to change my scale to get a better visual.
I was thinking about:
0
0,2
0,4
0,6
0,8
1
-0,8
-0,6
-0,4
-0,2
0
Anyone have a graph or a code that make its? Because I already tryed here a lot but never get a good solution
and I think this isn't that difficult! Thanks!

Hi EduU,
you can find your own threads by searching in your profile (just click your name) Or you could use the search function to look for "power factor graph"...
There were other possible solutions than mine, also without separating the values...
Message Edited by GerdW on 06-01-2010 03:18 PM
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

Power factor simulation and measurement

I need to simulate in LabView 7.1 an application that simulates an AC waveform (voltage and current) like if I take them directly from a facility and with this info calculate the Power Factor, Reactive, Active and Apparent power. all this for a single and three phase system.
I have little experience on Labview and all help will be appreciate it.
Thanks

There is an example program online that might help you out with single-phase AC circuits:
http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3E62356A4E034080020E74861&p_node=DZ52000_US&p_source=External
Hope this helps. Good luck!
Kileen

How to measure power factor in FPGA

Hello,
I am acquiring analog signals of 50 Hz frequency using NI 9215 and cRIO 9073.
I am using DC and RMS measurement FPGA VI to get the RMS value of voltage and current in the FPGA.
Similarly, i need to measure the power factor taking the voltage and current values in the FPGA.
I am able to get the power factor in RT using the VI , which calculates phase angle.
But in FPGA, I guess it is not direct. Please can I know, how to obtain the power factor in FPGA itself.
Thank you.
Hema

OK, I haven't used FPGA version, so I'm out of my cage. If it is indeed limited, as JamesBeams says above, then there's not much you can do except rework the math yourself.
I would think that such a VI would not be allowed to be transferred onto the FPGA in the first place, but that's just a guess.
Perhaps there's a list of acceptable / unacceptable FPGA vi functions, and you could confirm that it's not available.
You might also ask the tech support folks:
http://sine.ni.com/apps/utf8/niae_asc.main
Message Edited by CoastalMaineBird on 06-29-2009 05:14 AM
Steve Bird
Culverson Software - Elegant software that is a pleasure to use.
Culverson.com
Blog for (mostly LabVIEW) programmers: Tips And Tricks

Do I have Active Power Factor Correction?

I am trying to finalize which CyberPower battery backup system to get for my MacPro,1.
CyberPower has regular UPS battery back up and their sinewave battery backup, which they say is for computers with Active Power Factor Correction (PFC).
Does anyone know if my Mac Pro has APFC?
And if so, do I really "need" CyberPower's sinewave system, or can I use their regular UPS without sinewave (which is also less expensive)
(BTW, the APC UPS battery backup systems supply power to their surge outlets all the time even when you turn the APC off!)

I'm in NY USA. CyperPower makes a sine wave with 10 outlets, 5 for battery backup and 5 with surge. I measured my Mac Pro and it with my monitors came in at 450 watts so the CyberPower tech said I their CP1000PFCLCD which is 1000V and 600 watts would be more than enough. So I just bought one.
I wonder why everyone always goes right to the 1500. This is just for my home computer which all I need a battery backup is enough time to gracefully shut down versus a server.
I also got went with the sine wave over the non sine wave because of future use. I won't have this Mac Pro forever and newer computers supposedly like sine wave better. So for the few extra dollars I thought "think future use."
But do you think I got too low of a wattage capacity at 600 watts. I asked the tech twice: "are you sure 600 watts is enough?" He said definitely.
What do you think?

Timestep too small and Input Power Factor cannot be got

Hi All
I've just started using multisim 2001 to simulate Electronic Ballast circuits and am having trouble.
About Double-Stage Electronic Ballast circuit,it works well before using EMI circuit,but I get a "timestep too small" error message after using EMI circuit.
About Single-Stage Electronic Ballast circuit,it also works well before using Wattmeter,so I cannot get input Power Factor.Besides, I try to add EMI circuit, but noting works.
I attached my circuit to this email, could someone please give me some assistant? I would be really appreciated
Thanks
Attachments:
Double-Stage.msm ‏33 KB
Single-Stage.msm ‏20 KB

I have tried something, but I am still not sure I am getting accurate readings. What I did was to remove the bridge rectifiers and the AC Voltage source and replace them by a DC power source at the same voltage value. It seems to stablize the reading, but I am not sure how reliable it is or if that is what it should be. What I will do is post the two circuit for you and let you look at them. It takes a little bit for the reading to stabalize so just be patient.
Here they are:
Kittmaster's Component Database
http://ni.kittmaster.com
Have a Nice Day
Attachments:
Double-Stage_2.msm ‏30 KB
Single-Stage_Modified.msm ‏32 KB

Power factor Measurement using myDAQ

I have potential transformer (PT) & current transformer (CT) and want to measure the phase angle between then later i can do COS angle to get the power factor of the input signal.
I want to implemet this only by using myDAQ please dont suggest me to use another DAQ

You can build your own counter from the Digital input as shown below. For measuring the time period please follow this thread.
The best solution is the one you find it by yourself
Attachments:
CounterDI.vi ‏7 KB

Error in Proportional Factor Calculation Program

Hi ,
I have developed an ABAP Program to calculate Proportional Factor(PF) as below.
Generally,to calculate the PF for a period , we need to use transaction /sapapo/sdp94 to create a profile .After doing that , to calculate PF we need to go transaction /sapapo/mv8v .
Now,the given program has three options :-
1)Create : To create the selection-ID by taking areabasepackRS as name of the selection-ID . Here we need to give the excel sheet that is used to load data into /sapapo/mc8v to calculate PF.
2)Calculate PF : This option is used to calculate proportional factor.
   Now if we try to calculate PF ,I get an error message saying there are no
   plannable characteristic combinations .
3) Delete : This option is used to delete the selection profile.
I am getting an error in this program which I have explained with the document attached in this mail .
Please could anyone help me out with this .
The program is as below:-
<b>report ZRSNORMS_PPF
       no standard page heading line-size 255.</b>
*include bdcrecx1.
INCLUDE ZAPO_DATA_DECLARATION_PPF.
INCLUDE Z_APO_FORMS_PPF.
AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_file1.
CALL FUNCTION 'KD_GET_FILENAME_ON_F4'
   EXPORTING
     program_name        = syst-repid
DYNPRO_NUMBER       = SYST-DYNNR
     field_name          = p_file1
STATIC              = ' '
MASK                = ' '
    CHANGING
      file_name           = p_file1
EXCEPTIONS
MASK_TOO_LONG       = 1
OTHERS              = 2
IF sy-subrc <> 0.
    MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
            WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
start-of-selection.
PERFORM READ_DATA TABLES I_PROFILE
                           I_EXEL
                           IT_PROFILE_NAME
                    USING P_FILE1
                    CHANGING W_SUBRC.
PERFORM SAVE_SELECTION TABLES I_EXEL
                                IT_SAVE_SEL
                                IT_PROFILE_NAME.
IT_GRP-OBJNAM = 'ZRSBASPCK'.
APPEND IT_GRP.
LOOP AT IT_GRP INTO W_GROUP.
    APPEND W_GROUP TO IT_GROUP.
ENDLOOP.
G_PAREAID = 'ZRSPAHPC'.
G_MVIEW = 'ZRSPAHPC'.
G_COUNT = 0.
IF CREATE = 'X'.
LOOP AT IT_SAVE_SEL INTO W_SEL_SAVE.
    IF W_SEL_SAVE-IOBJNM = '9AVERSION' AND SY-TABIX > 1.
      G_COUNT = G_COUNT + 1.
      READ TABLE IT_PROFILE_NAME INDEX G_COUNT.
      G_NAME = IT_PROFILE_NAME-F_NAME.
      CALL FUNCTION '/SAPAPO/MCPSH_SELECTION_SAVE'
        EXPORTING
IV_SELID                       =
IV_FLG_USED_FOR                =
          IV_PAREAID                     = G_PAREAID
         IV_MVIEW                       = G_MVIEW
         IV_SEL_DESCRIPTION             = G_NAME
         IT_SELECTION                   = IT_SEL_SAVE
IT_OBJECTS                     =
         IT_SEL_GROUP                   = IT_GROUP
IV_POPUP_SEL_DESCRIPTION       =
IMPORTING
EV_SELID                       =
EV_SEL_DESCRIPTION             =
EXCEPTIONS
DUPLICATE_SELECTION            = 1
MULTIPLE_SELECTION             = 2
INCONSISTENT_DATABASE          = 3
DUPLICATE_DESCRIPTION          = 4
INVALID_DESCRIPTION            = 5
NO_PERMISSION                  = 6
SELID_INVALID                  = 7
OTHERS                         = 8
      IF SY-SUBRC <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
      ENDIF.
      CLEAR IT_SEL_SAVE[].
      APPEND W_SEL_SAVE TO IT_SEL_SAVE.
    ELSEIF W_SEL_SAVE-IOBJNM = '9AVERSION' AND SY-TABIX = 1.
      APPEND W_SEL_SAVE TO IT_SEL_SAVE.
    ELSE.
      APPEND W_SEL_SAVE TO IT_SEL_SAVE.
    ENDIF.
ENDLOOP.
G_COUNT = G_COUNT + 1.
READ TABLE IT_PROFILE_NAME INDEX G_COUNT.
G_NAME = IT_PROFILE_NAME-F_NAME.
CALL FUNCTION '/SAPAPO/MCPSH_SELECTION_SAVE'
    EXPORTING
IV_SELID                       =
IV_FLG_USED_FOR                =
      IV_PAREAID                     = G_PAREAID
     IV_MVIEW                       = G_MVIEW
     IV_SEL_DESCRIPTION             = G_NAME
     IT_SELECTION                   = IT_SEL_SAVE
IT_OBJECTS                     =
     IT_SEL_GROUP                   = IT_GROUP
IV_POPUP_SEL_DESCRIPTION       =
IMPORTING
EV_SELID                       =
EV_SEL_DESCRIPTION             =
EXCEPTIONS
DUPLICATE_SELECTION            = 1
MULTIPLE_SELECTION             = 2
INCONSISTENT_DATABASE          = 3
DUPLICATE_DESCRIPTION          = 4
INVALID_DESCRIPTION            = 5
NO_PERMISSION                  = 6
SELID_INVALID                  = 7
OTHERS                         = 8
IF SY-SUBRC <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
IV_GROUP = 'ZRSBASPCK'.
LOOP AT IT_SEL_SAVE INTO w_confirm_sel.
    APPEND w_confirm_sel TO it_confirm_sel.
ENDLOOP.
CALL FUNCTION '/SAPAPO/MSDP_SH_OBJ_LIST_BUILD'
    EXPORTING
      IV_PAREAID           = G_PAREAID
     IV_MVIEW             = G_MVIEW
    IV_DVIEW             =
    IV_FROMDATE          =
    IV_ENDDATE           =
    IV_NO_POPUPS         =
IMPORTING
    ET_SH_OBJECTS        =
EXCEPTIONS
    INVALID_INPUT        = 1
    INTERNAL_ERROR       = 2
    OTHERS               = 3
IF SY-SUBRC <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
CLEAR IT_SEL_SAVE[].
ENDIF.
if calc_ppf = 'X'.
PERFORM CALC_PPF TABLES I_EXEL
                          BDCTAB
                          IT_PROFILE_NAME.
ENDIF.
if del_prof = 'X'.
LOOP AT I_EXEL.
concatenate i_exel-area I_EXEL-BASE INTO DEL_NAME.
SELECT SINGLE * FROM /SAPAPO/TS_SELKO INTO IT_TS_SELKO
WHERE SEL_DESRCIPTION = DEL_NAME.
DEL_PROFILE = IT_TS_SELKO-SELECTIONID.
CALL FUNCTION '/SAPAPO/MCPSH_SELECTION_DELETE'
EXPORTING
    IV_SELID                    = DEL_PROFILE
IV_FLG_CONFIRM_TRANS        = 'X'
EXCEPTIONS
NO_ENTRY                    = 1
NO_AUTHORITY                = 2
DELETION_NOT_POSSIBLE       = 3
OTHERS                      = 4
IF SY-SUBRC <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
ENDLOOP.
ENDIF.
<b>INCLUDE   ZAPO_DATA_DECLARATION_PPF .</b>
types: t_ts_selpo type /sapapo/ts_selpo.
TYPES: BEGIN OF T_EXEL,
       PROF_DATFRM TYPE DATS,
       PROF_DATTO TYPE DATS,
       FORCAST_FROM TYPE DATS,
       FORCAST_TO TYPE DATS,
       AREA(60),
       BASE(60),
       POPID(60),
       RATING(60),
       RS(60),
       END OF T_EXEL.
types: begin of t_profile,
       obj(30),
       val(60),
       end of t_profile.
TYPES: begin of t_profile_name,
       f_name(60),
       end of t_profile_name.
DATA: G_COUNT TYPE I VALUE 0.
*TYPES: T_SAVE_SEL LIKE IT_SELECTION.
data: w_subrc TYPE sy-subrc,
      I_TS_SELPO TYPE Table of t_ts_selpo with header line,
      I_EXEL TYPE Table of t_EXEL with header line.
DATA: IV_GROUP TYPE /SAPAPO/IOBJNM.
DATA: IT_PROFILE_NAME TYPE TABLE OF T_PROFILE_NAME WITH HEADER LINE.
data: i_profile type table of t_profile with header line.
*/sapapo/ts_iobj_selection_tab.
data: IT_SEL_SAVE TYPE /sapapo/ts_iobj_selection_tab,
      w_SEL_SAVE type /SAPAPO/TS_IOBJ_SELECTION.
DATA: IT_CONFIRM_SEL TYPE /SAPAPO/SH_SEL_RANGE_TAB,
      W_CONFIRM_SEL TYPE /SAPAPO/SH_SEL_RANGE_STR.
TYPES: BEGIN OF T_SAVE_SEL,
       IOBJNM(30),
       SIGN,
       OPTION(2),
       LOW(60),
       HIGH(60),
       END OF T_SAVE_SEL.
DATA: IT_SAVE_SEL TYPE TABLE OF T_SAVE_SEL WITH HEADER LINE.
TYPES: BEGIN OF T_GRP,
      OBJNAM(30),
      END OF T_GRP.
DATA: IT_GRP TYPE TABLE OF T_GRP WITH HEADER LINE.
DATA DECLARATION FOR FUNC MODULE **************
DATA: IT_GROUP TYPE /SAPAPO/TS_GROUP_BY_TAB,
      W_GROUP TYPE /SAPAPO/TS_GROUP_BY_STR.
DATA: G_PAREAID TYPE /SAPAPO/TS_PAREAID,
      G_MVIEW TYPE /SAPAPO/PB_MVIEW,
      G_NAME TYPE /SAPAPO/TS_SEL_DESCR.
BDC TABLES ***************************
DATA: bdcdata LIKE bdcdata OCCURS 0 WITH HEADER LINE.
DATA: it_messtab LIKE bdcmsgcoll OCCURS 0 WITH HEADER LINE.
DATA : BDCTAB like BDCDATA occurs 0 with header line.
DATA : w_file type string.
****************BDC ERROR TAB ***************************
DATA : xcount1 TYPE i,
       xstat TYPE i,
       xmsgv1 LIKE balm-msgv1,
       xmsgv2 LIKE balm-msgv2,
       xmsgv3 LIKE balm-msgv3,
       xmsgv4 LIKE balm-msgv4,
       xmessage(80) TYPE c.
DATA : BEGIN OF t_errlog OCCURS 0,
        sno TYPE i,
        message(80) TYPE c,
        END OF t_errlog.
DATA: DEL_PROFILE TYPE /SAPAPO/SELECTIONID2,
      DEL_NAME(60).
************DUPLICATE NAME TAB **************************
DATA: IT_NOT_PROCESSED TYPE TABLE OF /SAPAPO/TS_SELPO WITH HEADER LINE.
DELETE TAB *****************************
DATA: IT_TS_SELKO TYPE TABLE OF /SAPAPO/TS_SELKO WITH HEADER LINE.
SELECTION-SCREEN : BEGIN OF BLOCK b1.
parameters: p_file1 TYPE rlgrap-filename.
parameters: create type c radiobutton group g1,
            calc_ppf type c radiobutton group g1,
            del_prof type c radiobutton group g1.
SELECTION-SCREEN END OF BLOCK b1.
Include           Z_APO_FORMS_PPF
*& Include           Z_APO_FORMS_PPF
*&      Form READ_DATA
      text
     -->P_I_PROFILE text
     -->P_I_EXEL text
     -->P_IT_PROFILE_NAME text
     -->P_P_FILE1 text
     <--P_W_SUBRC text
FORM READ_DATA TABLES   P_I_PROFILE STRUCTURE I_PROFILE
                         P_I_EXEL STRUCTURE I_EXEL
                         P_IT_PROFILE_NAME STRUCTURE IT_PROFILE_NAME
                USING    P_P_FILE1
                CHANGING P_W_SUBRC.
DATA : iexcel LIKE zexcel_read OCCURS 0 WITH HEADER LINE,
         G_DATE TYPE DATS.
data: l_name(60).
CLEAR p_w_subrc.
CALL FUNCTION 'ZALSM_EXCEL_TO_INTERNAL_TABLE'
    EXPORTING
      filename    = p_p_file1
      i_begin_col = 1
      i_begin_row = 1
      i_end_col   = 62
      i_end_row   = 50000
    TABLES
      intern      = iexcel.
   EXCEPTIONS
     inconsistent_parameters = 1
     upload_ole              = 2
     OTHERS                  = 3.
IF sy-subrc <> 0.
    p_w_subrc = 0 .
endif.
   MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
           WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
LOOP AT iexcel WHERE row > 1.
    IF iexcel-col = '0001'.
    PERFORM CONVERT_DATE CHANGING G_DATE iexcel-value.
    p_i_EXEL-PROF_DATFRM = G_DATE.
    ENDIF.
    IF iexcel-col = '0002'.
    PERFORM CONVERT_DATE CHANGING G_DATE iexcel-value.
      p_i_EXEL-PROF_DATTO = G_DATE.
       ENDIF.
    IF iexcel-col = '0003'.
    PERFORM CONVERT_DATE CHANGING G_DATE iexcel-value.
      p_i_EXEL-FORCAST_FROM = G_DATE.
    ENDIF.
    IF iexcel-col = '0004'.
    PERFORM CONVERT_DATE CHANGING G_DATE iexcel-value.
      p_i_EXEL-FORCAST_TO = G_DATE.
    ENDIF.
    IF iexcel-col = '0005'.
      p_i_EXEL-AREA = iexcel-value.
      p_i_profile-obj = 'ZRSAREA'.
      p_i_profile-VAL = iexcel-value.
      append p_i_PROFILE.
      clear p_i_PROFILE.
    ENDIF.
    IF iexcel-col = '0006'.
      p_i_EXEL-BASE = iexcel-value.
      p_i_profile-obj = 'ZRSBASPCK'.
      p_i_profile-VAL = iexcel-value.
         append p_i_PROFILE.
      clear p_i_PROFILE.
    ENDIF.
    IF iexcel-col = '0007'.
      p_i_EXEL-POPID = iexcel-value.
      p_i_profile-obj = 'ZRSPOPULN'.
      p_i_profile-VAL = iexcel-value.
         append p_i_PROFILE.
      clear p_i_PROFILE.
    ENDIF.
    IF iexcel-col = '0008'.
    p_i_EXEL-RATING = iexcel-value.
    ENDIF.
    IF iexcel-col = '0009'.
      p_i_EXEL-RS = iexcel-value.
      p_i_profile-obj = 'ZRSCUSTMR'.
      p_i_profile-VAL = iexcel-value.
      append p_i_PROFILE.
      clear p_i_PROFILE.
    ENDIF.
    at end of row.
      append p_i_EXEL.
      clear p_i_EXEL.
    endat.
endloop.
loop at P_I_EXEL.
concatenate P_I_EXEL-AREA P_I_EXEL-BASE INTO L_NAME.
P_it_profile_name-f_name = l_name.
append P_it_profile_name.
ENDLOOP.
ENDFORM.                    " READ_DATA
*&      Form CONVERT_DATE
      text
     <--P_G_DATE text
     <--P_IEXCEL_VALUE text
FORM CONVERT_DATE CHANGING P_G_DATE
                            P_IEXCEL_VALUE.
                            CALL FUNCTION 'CONVERT_DATE_TO_INTERNAL'
EXPORTING
    DATE_EXTERNAL                  = p_iexcel_value
ACCEPT_INITIAL_DATE            =
IMPORTING
   DATE_INTERNAL                  = p_g_date
EXCEPTIONS
DATE_EXTERNAL_IS_INVALID       = 1
OTHERS                         = 2
IF SY-SUBRC <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
ENDFORM.                    " CONVERT_DATE
*&      Form SAVE_SELECTION
      text
     -->P_I_EXEL text
     -->P_IT_SAVE_SEL text
     -->P_IT_PROFILE_NAME text
FORM SAVE_SELECTION TABLES   P_I_EXEL STRUCTURE I_EXEL
                              P_IT_SAVE_SEL STRUCTURE IT_SAVE_SEL
                              P_IT_PROFILE_NAME STRUCTURE IT_PROFILE_NAME.
DATA: L_PAREAID(40).
loop at p_i_exel.
p_it_save_sel-iobjnm = '9AVERSION'.
p_it_save_sel-SIGN = 'I'.
p_it_save_sel-OPTION = 'EQ'.
p_it_save_sel-LOW = '000'.
APPEND P_IT_SAVE_SEL.
CLEAR P_IT_SAVE_SEL.
p_it_save_sel-iobjnm = 'ZRSAREA'.
p_it_save_sel-SIGN = 'I'.
p_it_save_sel-OPTION = 'EQ'.
p_it_save_sel-LOW = P_I_EXEL-AREA.
APPEND P_IT_SAVE_SEL.
CLEAR P_IT_SAVE_SEL.
IF NOT P_I_EXEL-BASE IS INITIAL.
p_it_save_sel-iobjnm = 'ZRSBASPCK'.
p_it_save_sel-SIGN = 'I'.
p_it_save_sel-OPTION = 'EQ'.
p_it_save_sel-LOW = P_I_EXEL-BASE.
ENDIF.
APPEND P_IT_SAVE_SEL.
CLEAR P_IT_SAVE_SEL.
IF NOT P_I_EXEL-POPID IS INITIAL.
p_it_save_sel-iobjnm = 'ZRSPOPULN'.
p_it_save_sel-SIGN = 'I'.
p_it_save_sel-OPTION = 'EQ'.
p_it_save_sel-LOW = P_I_EXEL-POPID.
APPEND P_IT_SAVE_SEL.
CLEAR P_IT_SAVE_SEL.
ENDIF.
IF NOT P_I_EXEL-RS IS INITIAL.
p_it_save_sel-iobjnm = 'ZRSCUSTMR'.
p_it_save_sel-SIGN = 'I'.
p_it_save_sel-OPTION = 'EQ'.
p_it_save_sel-LOW = P_I_EXEL-RS.
APPEND P_IT_SAVE_SEL.
CLEAR P_IT_SAVE_SEL.
ENDIF.
write 'hi'.
*CLEAR P_IT_SAVE_SEL[].
ENDLOOP.
*submit
ENDFORM.                    " SAVE_SELECTION
*&      Form CALC_PPF
      text
     -->P_I_EXEL text
     -->P_BDCTAB text
     -->P_IT_PROFILE_NAME text
FORM CALC_PPF TABLES   P_I_EXEL STRUCTURE I_EXEL
                        P_BDCTAB STRUCTURE BDCTAB
                        P_IT_PROFILE_NAME STRUCTURE IT_PROFILE_NAME.
DATA: PERIOD_FROM TYPE /SAPAPO/BASIS_VON_BIS,
      PERIOD_TO TYPE /SAPAPO/BASIS_VON_BIS,
      TRANSFER_FORM TYPE /SAPAPO/TARGET_VON_BIS,
      TRANSFER_TO TYPE /SAPAPO/TARGET_VON_BIS,
      SEL_PROFILE TYPE /SAPAPO/SEL_TXT.
DATA: SEL_NAME(60).
DATA : L_TEMP TYPE SY-DATUM,
       L_TEMP1 TYPE SY-DATUM,
       L_TEMP2 TYPE SY-DATUM,
       L_TEMP3 TYPE SY-DATUM.
LOOP AT P_I_EXEL.
L_TEMP0(2) = P_I_EXEL-FORCAST_FROM6(2). "passed date
L_TEMP2(2) = P_I_EXEL-FORCAST_FROM4(2). "passed Month
L_TEMP4(4) = P_I_EXEL-FORCAST_FROM0(4). "passed year
L_TEMP10(2) = P_I_EXEL-FORCAST_TO6(2). "passed date
L_TEMP12(2) = P_I_EXEL-FORCAST_TO4(2). "passed Month
L_TEMP14(4) = P_I_EXEL-FORCAST_TO0(4). "passed year
L_TEMP20(2) = P_I_EXEL-PROF_DATFRM6(2). "passed date
L_TEMP22(2) = P_I_EXEL-PROF_DATFRM4(2). "passed Month
L_TEMP24(4) = P_I_EXEL-PROF_DATFRM0(4). "passed year
L_TEMP30(2) = P_I_EXEL-PROF_DATTO6(2). "passed date
L_TEMP32(2) = P_I_EXEL-PROF_DATTO4(2). "passed Month
L_TEMP34(4) = P_I_EXEL-PROF_DATTO0(4). "passed year
PERIOD_FROM = L_TEMP2.
PERIOD_TO = L_TEMP3.
transfer_form = L_TEMP.
TRANSFER_TO = L_TEMP1.
concatenate P_I_EXEL-AREA P_I_EXEL-BASE INTO SEL_NAME.
SEL_PROFILE = SEL_NAME.
perform bdc_dynpro      using '/SAPAPO/RMDP_SHARE_VERSION_M' '1000'.
perform bdc_field       using 'BDC_CURSOR'
                              'BPAREAID'.
perform bdc_field       using 'BDC_OKCODE'
                              '=ONLI'.
perform bdc_field       using 'PAREAID'
                              'ZRSPAHPC'.
perform bdc_field       using 'FLG_AREA'
                              'X'.
perform bdc_field       using 'BPAREAID'
                              'ZRSPAHPC'.
perform bdc_dynpro      using '/SAPAPO/RMDP_SHARE_MANAGER' '1000'.
perform bdc_field       using 'BDC_OKCODE'
                              '=UCOMM1'.
perform bdc_field       using 'BDC_CURSOR'
                              'Z_DATE-HIGH'.
perform bdc_field       using 'B_VER'
                              '000'.
perform bdc_field       using 'B_KENN'
                              '9AVCORHIST'.
perform bdc_field       using 'B_DATE-LOW'
                              PERIOD_FROM.
perform bdc_field       using 'B_DATE-HIGH'
                              PERIOD_TO.
perform bdc_field       using 'VERSION'
                              '000'.
perform bdc_field       using 'Z_DATE-LOW'
                              transfer_form.
perform bdc_field       using 'Z_DATE-HIGH'
                              TRANSFER_TO.
perform bdc_field       using 'FLG_ONE'
                              'X'.
perform bdc_dynpro      using '/SAPAPO/RMDP_SHARE_MANAGER' '1000'.
perform bdc_field       using 'BDC_OKCODE'
                              '=ONLI'.
perform bdc_field       using 'BDC_CURSOR'
                              'SEL_TXT'.
perform bdc_field       using 'SEL_TXT'
                               SEL_PROFILE.
perform bdc_dynpro      using '/SAPAPO/RMDP_SHARE_MANAGER' '1000'.
perform bdc_field       using 'BDC_OKCODE'
                              '/EE'.
perform bdc_dynpro      using '/SAPAPO/RMDP_SHARE_VERSION_M' '1000'.
perform bdc_field       using 'BDC_OKCODE'
                              '=ONLI'.
perform bdc_field       using 'BDC_OKCODE'
                              '/EE'.
perform bdc_field       using 'BDC_CURSOR'
                              'PAREAID'.
*perform bdc_transaction using '/SAPAPO/MC8V'.
SELECT SINGLE * FROM /SAPAPO/TS_SELKO INTO IT_TS_SELKO
WHERE SEL_DESRCIPTION = sel_NAME.
if sy-subrc = 0.
call transaction '/SAPAPO/MC8V'
         using bdctab
         mode 'A'
         update 'L'
         messages into it_messtab.
describe table it_messtab lines xcount1.
read table it_messtab index xcount1.
LOOP AT it_messtab WHERE msgtyp = 'E'
                                 OR msgtyp = 'A'.
            MOVE It_messtab-msgv1 TO xmsgv1.
            MOVE It_messtab-msgv2 TO xmsgv2.
            MOVE It_messtab-msgv3 TO xmsgv3.
            MOVE It_messtab-msgv4 TO xmsgv4.
      CALL FUNCTION 'MESSAGE_PREPARE'
        EXPORTING
         LANGUAGE                     = sy-langu
          msg_id                       = It_messtab-msgid
          msg_no                       = It_messtab-msgnr
         MSG_VAR1                     = xmsgv1
         MSG_VAR2                     = xmsgv2
         MSG_VAR3                     = xmsgv3
         MSG_VAR4                     = xmsgv4
       IMPORTING
         MSG_TEXT                     = xmessage
       EXCEPTIONS
         FUNCTION_NOT_COMPLETED       = 1
         MESSAGE_NOT_FOUND            = 2
         OTHERS                       = 3
      IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
      ENDIF.
      MOVE sy-tabix TO t_errlog-sno.
      MOVE xmessage TO t_errlog-message.
            APPEND t_errlog.
            CLEAR t_errlog..
          ENDLOOP.
CLEAR BDCTAB[].
CLEAR SEL_NAME.
CLEAR P_I_EXEL.
endif.
ENDLOOP.
ENDFORM.                    " CALC_PPF
*&      Form bdc_dynpro
      text
     -->P_0424   text
     -->P_0425   text
FORM bdc_dynpro USING PROGRAM DYNPRO.
CLEAR bdcTAB.
bdcTAB-program = program.
bdcTAB-dynpro   = dynpro.
bdcTAB-dynbegin = 'X'.
APPEND bdcTAB.
ENDFORM.                    " bdc_dynpro
*&      Form bdc_field
      text
     -->P_0494   text
     -->P_TRANSFER_FROM text
FORM bdc_field USING FNAM FVAL.
CLEAR bdcTAB.
bdcTAB-fnam = fnam.
bdcTAB-fval = fval.
APPEND bdcTAB.
ENDFORM.                    " bdc_field

Hi,
As I have not been able to attach the document, I will explain the problem in full as below:-
Business scenario - Consider a factory having 5 different customers (which is known as Customer_rs). We need to supply stock to each of them based on their past consumption. So to forecast this, we calculate a factor known as proportional factor based on the data we have for previous months.
So to calculate the PF for a period, we need to create a profile in /sapapo/sdp94 .
After creating the profile, the profile can be seen by clicking on SPD94 and going to selection-screen button .
Then to calculate PF , we need to go to transaction /sapapo/mv8v .
Here we will have to give the selection id that was saved in SDP94.
All this process has to be automated and a program has been created to do this.
A description of how the program works is as given below.
When we try to calculate the proportional factor with this program , the following error is obtained :-
There are no plannable characteristic combinations.
We are passing the same parameters that were passed by the SDP94 transaction to the standard function module for saving the selection ids. This is shown in the below screenshots.
In spite of this we are getting the error.
Now to delete the selection ids,click on delete option in the program .
But the problem is even if we click on delete , the PPF data will be stored in the database inspite of deleting the selection profiles .
Please can anyone help me out with this .
Regards,
Sushanth H.S.
                                                                                Now we will have to give the selection description
Now the profile can be seen by going to SDP94 and clicking on selection profile button.
Now to calculate PF, go to transaction /sapapo/mv8v
Click on execute and give following inputs
This will forecast the PF for the period 01.09.2007 to 21.02.2007 based on data from 21.04.2007 to 20.05.2007
Click on other settings
Here we will have to give the selection id that was saved in SDP94.
Click on execute.
All this process has to be automated and a program was created to do this.
A description of how the program is given below.
Program zrsnorms_ppf
Execute.
Give file path of excel sheet.
Execute.
This will create the selection id by taking areabasepackRS as name of id.
This is the excel sheet that is used to load data into /sapapo/mc8v to calculate the PF.
Upon executing, the ids have been created
The new selection ids can be seen by going to /sapapo/sdp94
And clicking on selection profile.
Parameters passed to standard function module in order to save the selection id.
Now if we try to calculate PF using the program, the following happens
When executed,
BDC is called to input data to transaction /sapapo/mc8v to calculate ppf.
An error screen is generated with the message There are no plannable characteristic combinations.
We are passing the same parameters that were passed by the SDP94 transaction to the standard function module for saving the selection ids. This is shown in the below screenshots.
In spite of this we are getting the error.
When IV_POPUP_SEL_DESCRIPTION is passed, a popup will be displayed where the selection description will have to be entered. I am passing the same selection description here as is picked by the program.( H3HPCDEL00110096, H3HPCDEL00110063)
To avoid this, we need to go to SDP94 and after going to selection window, we need to save the selections as shown in the following screenshots.
Select the selection id one by one.
Click on save selection
Click on save.
Do the same for all ids created by the program.
Now if we try to calculate the PF using the program, it is seen to work
So what needs to be done is that we need to avoid going to SDP94 in order to save the selections after the ids are created by the program.
How the Program works
Se38
Program zrsnorms_ppf
Execute.
Give file path of excel sheet.
Execute.
This will create the selection id by taking areabasepackRS as name of id.
The new selection ids can be seen by going to /sapapo/sdp94
And clicking on selection profile.
Now the selection has to be saved. For that, follow the following procedure.
Click on selection window.
Click on load selection.
Select the ids.
Select and then press save.
Do the same for every id.
Only then can proportional factor be calculated.
Now go to program and select Calc_ppf, with filepath to excel sheet as the sel_ids will be pulled from the excel.
When executed,
BDC is called to input data to transaction /sapapo/mc8v to calculate ppf.
Now go to sdp94 and load the selection
Click on load data.
And make sure, data view is TDP_VIEW_PROP as shown
PPF will be shown for the period chosen in the excel sheet.
Now to delete the selection ids.
Go to the program and give file path of the excel sheet and execute.
The selection profiles will be deleted as shown.
But PPF data will be stored in the database inspite of deleting the selection profiles. And ppf can be shown by selecting the basepack and the sales area.
Click load data.
Business scenario - Consider a factory having 5 different customers (which is known as Customer_rs). We need to supply stock to each of them based on their past consumption. So to forecast this, we calculate a factor known as proportional factor based on the data we have for previous months.
So to calculate the PF for a period, we need to create a profile in /sapapo/sdp94
How it is done in standard transaction /SAPAPO/SDP94
Important pushbuttons and their functions
Click on selection window.
Give the selections
Click on save selection
A break-point has been set in the standard program to show what all parameters are being passed to the standard function module /SAPAPO/MCPSH_SELECTION_SAVE used to save the selection
Now we will have to give the selection description
Now the profile can be seen by going to SDP94 and clicking on selection profile button.
Now to calculate PF, go to transaction /sapapo/mv8v
Click on execute and give following inputs
This will forecast the PF for the period 01.09.2007 to 21.02.2007 based on data from 21.04.2007 to 20.05.2007
Click on other settings
Here we will have to give the selection id that was saved in SDP94.
Click on execute.
All this process has to be automated and a program was created to do this.
A description of how the program is given below.
Program zrsnorms_ppf
Execute.
Give file path of excel sheet.
Execute.
This will create the selection id by taking areabasepackRS as name of id.
This is the excel sheet that is used to load data into /sapapo/mc8v to calculate the PF.
Upon executing, the ids have been created
The new selection ids can be seen by going to /sapapo/sdp94
And clicking on selection profile.
Parameters passed to standard function module in order to save the selection id.
Now if we try to calculate PF using the program, the following happens
When executed,
BDC is called to input data to transaction /sapapo/mc8v to calculate ppf.
An error screen is generated with the message There are no plannable characteristic combinations.
We are passing the same parameters that were passed by the SDP94 transaction to the standard function module for saving the selection ids. This is shown in the below screenshots.
In spite of this we are getting the error.
When IV_POPUP_SEL_DESCRIPTION is passed, a popup will be displayed where the selection description will have to be entered. I am passing the same selection description here as is picked by the program.( H3HPCDEL00110096, H3HPCDEL00110063)
To avoid this, we need to go to SDP94 and after going to selection window, we need to save the selections as shown in the following screenshots.
Select the selection id one by one.
Click on save selection
Click on save.
Do the same for all ids created by the program.
Now if we try to calculate the PF using the program, it is seen to work
So what needs to be done is that we need to avoid going to SDP94 in order to save the selections after the ids are created by the program.
How the Program works
Se38
Program zrsnorms_ppf
Execute.
Give file path of excel sheet.
Execute.
This will create the selection id by taking areabasepackRS as name of id.
The new selection ids can be seen by going to /sapapo/sdp94
And clicking on selection profile.
Now the selection has to be saved. For that, follow the following procedure.
Click on selection window.
Click on load selection.
Select the ids.
Select and then press save.
Do the same for every id.
Only then can proportional factor be calculated.
Now go to program and select Calc_ppf, with filepath to excel sheet as the sel_ids will be pulled from the excel.
When executed,
BDC is called to input data to transaction /sapapo/mc8v to calculate ppf.
Now go to sdp94 and load the selection
Click on load data.
And make sure, data view is TDP_VIEW_PROP as shown
PPF will be shown for the period chosen in the excel sheet.
Now to delete the selection ids.
Go to the program and give file path of the excel sheet and execute.
The selection profiles will be deleted as shown.
But PPF data will be stored in the database inspite of deleting the selection profiles. And ppf can be shown by selecting the basepack and the sales area.
Click load data.

Power Pivot - Calculating Exchange Rates depending on MONTH

Hello everyone, I have a question, would like to know if someone can help me figuring out a solution. I have created a spreadsheet using powerquery and powerpivot. Loading the data on powerquery from different spreadsheets was a charm, the problem is calculating
the exchange rates per month. Let me try to explain better;
The structure is as following:
I have 3 tables, they are:
Dates– Just a dates (loaded directly on PowerPivot).
Invoice – Details of invoices for all customers, gross totals are in different rates (loaded through power query)
Customer – Detailed information of customers (loaded directly on PowerPivot).
Currency – exchange rates (loaded directly on PowerPivot).
Note: I mentioned where they were loaded because I do not know if that really matters, I guess it does not... but extra information will not hurt. Now, let's go to how these tables are connected between each other and their key columns:
The Invoice table has information on invoices dates, invoice gross total and customer code. This table is related to Customer table, which has the actual name of customers and other details. This link is done through the Customer Code column. The Currency
table have a relationship with the Customer Table through the Country Column.
What I want to achieve is a formula to do the exchange rate based on the Invoice Date column present on the Invoice Table. So I have created a column on the Currency Table named at each month of the year and populated it with the exchange rates for all countries
(countries listed using ISO3 format).
My problem is while I am able to select a column from the Currency table to do the exchange rate calculation using the below formula, I fail to realize how to do it per month:
=CALCULATE(sum(invoice[Gross Value])*SUM(Currency[Reverse]))
*Reverse is the column with the exchange rate for the country money to USD
What I am failing to do is how to make that calculation to also consider the month of the invoice and pull the exchange rate for the same month from the Currency table… something like:
Get the invoice date then find the column on Currency[Month] and multiply, providing me the USD amount.
I was unable to figure out a solution using the filters parameters from Calculate. If some of you ask why I am using SUM inside Calculate, is because if I only use SUM and try to do the math between the two tables I get an error saying that it was not possible
to determine the value on Currency[Reverse]. Same happens with SUMX. It worked out with Calculate, but then I cannot create other formulas using CALCULATE on that table because it will give that error on redundancy, unless I add a filter on it, which worked
last time (but I do not remember which thing /parameter used to filter, so do not ask it right now :D)
To be honest… I do not really need that level of accuracy, but my Virgo perfectionist side demands me to find a solution to that, that will not use a single exchange rate, but consider which is the correct exchange rate for the month of the invoice and calculate
it correctly for all invoices. Just so you know, the Invoices tables has more than 1million lines.
Anyone know how to crack this problem or can point me to some site where I can learn how to do it?
Thanks for the time reading all of this, even if you cannot help, I really appreciate it ;)

Hi Estevao,
Having problems to understand how you managed to combine your currency table with the customer table by Country ID. Where’s the 1-side of this relation (many customers in the same country and many months for the same currency)?
Anyway: Seeing that you already use Power Query, I’d suggest that you prepare your data in a way that you can connect your currency table with your invoice table instead of with your customer table. Create a field in your Invoice Table
that concatenates Customers CountryID&Month.
Imke

S&OP factor calculation (alpha, beta, gamma)

Hi gurus,
I´m trying to adap the automatic forecast selection in MC88 transaction to a graphic company scenario. They have several clients where they planned all the forecast for them, based on increase/decrease sales of each client. Today they are using the alpha, beta, gama factors but they still need to calculate the demand in a Excel spreadsheet and adjust the result in SAP.
My questions are:
- There´s any way to change the factors criteria? For example, if I want to increase the forecast for 2012 in 10% over 2011. If not, anyone knows a way to input this growing factor into the automatic forecast?
- I already found the formulas for the alpha, beta, gamma, but it´s not didactic to explain to some users. Anyone knows where I can find a simple and objective explanation for this factors?
Thanks in advance.
Best Regards,
Felipe Tavares

Hi,
It's your wrong assumption that clients are not using Forecast. Most of the Retails clients are effectively using forecast.
Without forecasting, Retail operation will not work at all.
A demand forecast is a prediction of the amount of each article / product that will be sold in the future. It's easy to see that inaccurate forecasts can cause major problems for your company. When forecasted demand is far below actual demand for a product, you risk running out of products and disappointing your customers. If forecasted demand exceeds actual usage, you'll probably be faced with large quantities of dead stock and slow-moving inventory.
For your company to be successful, your demand forecasts for products must be as accurate as possible.
(a) Alpha is used in the basic value calculation
(b) Beta is used in trend value calculation
(c) Gamma is used in the Seasonal index calculation
The value for the parameters range from 0 to 1. A higher value will place more emphasis on recent history. The parameters also control how reactive the forecast is to changes in historical patterns.
This is FYI.
Bye,
Muralidhara

Effects of using EF in EF-S camera and lens crop factor calculations.

I have read a lot about APS-C sensors and the differences between EF and EF-S lenses.
I still have two remaining questions regarding how EF-S lenses are marketed.
1) Do EF-S lenses need to have the 1.6x factor applied for effective focal length or are they marked correctly since they can only be used in APS-C cameras?
E.G. My 17-40mm EF 4L lens is effectively a 27.2-64mm when used in a EF-S mount camera due to the 1.6x factor.
So would a 60mm EF-S prime lens actually be similar to a 60mm EF prime lens in terms of focal and "zoomed" level of the image? Or would it also apply the crop factor and be effectively a 96mm focal length?
2) Are there any other attributes of an EF lens that you must apply a conversion when using in an EF-S mount? F-stop rating?
Thank you in advance for any guidance you provide!!
Solved!
Go to Solution.

techjedi wrote:
I have read a lot about APS-C sensors and the differences between EF and EF-S lenses.
I still have two remaining questions regarding how EF-S lenses are marketed.
1) Do EF-S lenses need to have the 1.6x factor applied for effective focal length or are they marked correctly since they can only be used in APS-C cameras?
E.G. My 17-40mm EF 4L lens is effectively a 27.2-64mm when used in a EF-S mount camera due to the 1.6x factor.
So would a 60mm EF-S prime lens actually be similar to a 60mm EF prime lens in terms of focal and "zoomed" level of the image? Or would it also apply the crop factor and be effectively a 96mm focal length?
2) Are there any other attributes of an EF lens that you must apply a conversion when using in an EF-S mount? F-stop rating?
Thank you in advance for any guidance you provide!!
If you feel obliged to think in full-frame terms even when using an APS-C camera, then yes, the crop factor is applied equally to zooms and primes. But unless you routinely use both types of camera, the mental exercise is really rather silly. Better to simply get used to the idea that on an APS-C camera a 30mm lens is "normal"; a 50mm lens is a mild telephoto or portrait lens; a 17-55mm zoom is a typical "walking around" lens; etc. Once you start thinking in those terms, you're much less likely to select the wrong lens than if you have to constantly apply the correction factor. If you do use both APS-C and FF cameras, you'll quickly get used to selecting, for example, the right normal lens for either type of camera, because you already know, in each case, what that is. At least that's what I've found to be true.
Bob
Boston, Massachusetts USA

Measuring point for Power Factor Meter

Dear All Experts,
I need to create PF meter as Measuring Point.
I have created characteristic PF without any unit of measure assigned to it since PF is a ratio.
Now if I create Measuring point using characteristic PF system does not allow me to create the same popping up message" only characterisitcs with a unit of measure can be used."
Then I created a unit as Ratio and assigned to the Characteristic PF.
Even then system does not allow me to create measuring point popping up the same message.
Please help.
Regards,
Sanjay

Hi,
You could create the Measuring Point only with the characteristics with Numeric UoM. So create the ratio with Numeric UoM & try the same.
Regards,
Maheswaran.

Power factor calculation

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