CTR-500 field-device power

Hello forum,
I have recently started my FP adventure, and am pretty impressed with what I have achieved so far ... Still, since I completely lack knowledge of electronics, I hesitate for the following. I have an FP-CTR-500 that is neatly counting pulses from anemometers, water-consumption counters etc. All these devices are powered through the 24VDC power that I piggy-backed from the FP1600. Now, the new counter I'd like to install takes 3VDC in the pulse-generating loop, and I wonder whether I can have this connected to the same CTR, and in what way. Can I use a separate external power supply ?! Any suggestions ?! Thanks a lot for your help,
Amicalement,
Jan Bayer

According to the
device specifications the CTR500 input range is 10 to 30 VDC, so your
understanding is correct on that point. Hence 2 solutions : either you manage
to use signal conditioning to increase your input voltage, or you have to use
another device.
Regards,
Matthieu B.
NI France
Cordialement / Regards, Matthieu B. @ NI France.

Similar Messages

FP-CTR-500 outputs are failed?..

We are working with a tandem FP-1600/FP-CTR-500, and we have set the 4 outputs of the counter module in toggle mode, using 2 counter channel to generate square-waves. All 4 output LEDs are blinking OK, but there are no change in the voltages of physical outputs (position 13, 14, 15 y 16 of terminal block). 24 VDC/ground of power supply is connected to pin V and C, and each different output has a fixed voltage level of 0.65 to 0.85 Volts aprox., even after power-up or general reset. By this way, there are no loads connected to those outputs. Can anybody help me?.

I really do not recommend the self-repair option.
I must point out that opening the module and making any changes to the circuit board voids all warranties on the device. Additionally, whereas I have a fairly good idea of what components need to be replaced, there is no guarentee that what we believe are the damaged components are actually the components at fault. Furthermore, for the components that I would suggest as the likeliest possible cause, your electronic maintenance department may or may not have industrial rated components available to replace the components and would not be set up to fully test the module after it is repaired. The test fixtures at National Instruments for the FP-CTR-500 are set up to test the cou
nt inputs, internal clocks, frequency rejection filters, outputs, gates, input bandwidth and output bandwith.
However, if you feel that your department is up to it, and are willing to void the warranty, then I can tell you which of the components (by the way, these are surface mount IC's) are the likeliest to have been damaged.
Regards,
Aaron

Why does Lookout receive wrong count from FP-CTR-500

Counter module flashes light count = to field pulse input device. Lookout fieldpoint object follows device count, but occassionally double counts giving wrong results. Is this a hardware problem with the counter module? A second counter in the system works as expected. Both are wired the same way and read the same way in the software and are receiving signals from like field devices.

Mike,
To rule out the possibility of this being a hardware problem in the FP-CTR-500 module, you can swap both of your FP-CTR-500 modules. I suspect that the problem will remain on the same signal/channel indicating that it is most likely a signal problem.
You may be receiving a double count as a result of noise or signal differences in the sensors wired to the various channels. To reduce the likelihood of a spurious signal causing a double count, you can enable the low pass filter on the FP-CTR-500 to reject signals above 200 Hz. If you look at the signal on a scope, you may see that it is fairly noisy and could use some filtering. Also, consider if one sensor has a longer cable run then the other or if it routes near something that may be electricall
y noisy.
Regards,
Aaron

How can we substitute the invalid option "reset after read" in FP-CTR-500 + FP-1600 frequency measurement application?

We nned to incorpore the values of 2 frequency signals (0-10 Khz)into a process controlled by a VisualBasic application running on 1 PC with W'95. Because the FP-CTR-500 working with FP-1600 hasn't the option "reset after read", the process of reading is a bit complicate, and sometimes, we receive wrong values of frequency from those devices. Could you help me? Is there any extremely reliable method of reading? Best regards,
Puho

For frequency measurement information on the FP-CTR-500/502 modules. Please see KnowledgeBase Article #1TB63SUS
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/d8db42f9fdc3607e862568640047f144?OpenDocument
Ultimately, the FP-CTR-500/502 modules are not designed for frequency measurement, although it is possible to use them to measure frequency. The one thing is that it works best to do the measurements over relatively long integration periods (1/4 second or more).
Regards,
Aaron

CTR 500 problem.

We used fielpoint CTR 500 in a project and we noticed the following strange abnormality in their operation : everything is normal for several days. Suddenly, CTR 500 stops counting. The leds are blinking but in fieldpoint explorer (version 3.02), though everything looks normal the channels shows zero and I do not receive any alarm message. Restarting the PC nothing changes. Restarting fieldpoints by stopping and starting again power supply channels start counting again. Is there any explanation for this specific problem?

Hi,
The first thing you should check whenever this behavior comes up is the signal you are inputing in the FP-CTR module. This module has a threshold in the range of 6 to 10 V, that means the threshold of a particular module might be 10 V, so in order to garantee proper behavior your input signal should be at least at the level of 10 V.
Monitor the signal in the input, because the LEDs have a slightly lower threshold then the input itself, so your signal might be activating the LED and not activating the input. The fact that you have to power cycle the module might somehow make your signal level to come back to the expected level.
So the key point in this case is to monitor the input signal is in the necessary range.
Best Regards
Andre Oliveira
Applications Engineer
National Instruments

Voltage loss on incoming signal to CTR-500

I have an optical sensor with at 12Vdc power supply hooked up to a CTR-500 module with the cFP-2020. I am trying to set it up to pick up the RPM of a motor. The speed range of the sensor is 1-250000RPM which is more than enough since the max I will see is 4000RPM. With the Power supply either routed through the Module or not through the module, I can see a 10V pulse on a scope comming from the sensor(when sensor line is not connected to module) But once the signal is connected to the channel I want to read it with, the signal Pulse Voltage drops to about 8.5Vdc, which is under the requirement to generate a count.
Can anyone tell me why I am getting a voltage drop? How can i fix it.

rameymm,
The 10 V you read from the sensor with a scope, what is the ground referenced to? When you are measuring the voltage at the inputs of the module, COM is tied to the ground of the 12 V power supply. It is possible that you have a common mode voltage.
Is there anyway you can increase the high voltage the sensor outputs? 10 V is pretty close to the 10 V minimum required between Vin and COM to register an ON state.
Ames
Applications Engineering
National Instruments

Flowmeter with FP-CTR-500/502

Hi to all,
any people have experiencing for flowmeter with a counter NI FP-CTR-500/502,
its a right choice for mesureament from 4 to 400 GUS/h ?
Many thanks in advance for any indication.
Best regards.

Hi adrtab5,
I'm not sure about what GUS/h means. Looks like a sort of "rotation rate" something like rpm but slower.
Anyway you can find information about 500/502 specs on this KB Measuring Frequency With the FP-CTR-500/502
And obviously in the manual FP-CTR-500 and cFP-CTR-500 Operating Instructions.
You should see if the specification of the CTR-500 match your needs, namely the specification of your flowmeter.
Here's an extract.
Input Characteristics
Number of channels.......................... 12 (8 count, 4 gate)
Input type..........................................10–30 VDC sinking,
compatible with most 12 and
24 VDC devices
Maximum input voltage....................30 VDC
Input threshold level
ON state......................................≥10 V
OFF state ....................................≤6 V
Input current limiting........................5 mA maximum
Input bandwidth
Count inputs ...............................50 kHz; 200 Hz with
software-enabled lowpass
filter
Gate inputs..................................50 kHz
Maximum off-state leakage
current for external devices...............0.2 mA
Best Regards
FiloP
It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrong.
Richard P. Feynman

FP-CTR-500 don't read external count inputs

I have 4 frequency signal inputs (0-10 KHz) connected to ports 2,3,4,5 of one FP-CTR-500, but I can't read any change on counting values, using FieldPoint Explorer. The module is OK, all the LEDs are green, including those four inputs, the firmware version of FP-1600 is 4.11 and software version of FieldPoint Explorer is 3.0.0 I can view a fix value of 53xx counts on each input, after a power up sequence (the external frequency is 8.2 KHz aprox.). What can I do?

There are several reasons that you may be having problems with the count. First, if the channel LED is always on, then the signal wired into the FP-CTR-500 may not be going low enough (below 6 volts) for the module to see the falling and rising edges. Second, if the inputs have been configured with the 200 Hz low pass filter setting, you may be filtering out your signal. Third, if you have configured the count channels for internal count inputs (1 kHz Reference or 32 kHz Reference) or previous count channel, then the module is not looking at your actual wired signals. Fourth, If you have enabled the Gate Inputs (channels 8-11) for any of the counters, then the count will not increment while the gate is low. Fifth, if the channel is configured for Reset On Read fu
nctionality, every time the FP-1600 polls the FP-CTR-500, the channel will reset itself.
Regards,
Aaron

I need to upload a pdf with more than 500 fields, but not all need to be registered.

We are working on a pdf to send to our customers. The form has more than 500 fields but we only need to register some of them, the other fields will be filled in the pdf, saved and sent bak to us. Is there any way to do that?
Thanks in advance.

I am sorry but there is no way to designate some fields for online collection and others not.
Andrew

This device cannot start. (Code 10) Status Device Power Failure for Intel (R) Audio Display

Hi I just bought HP Envy M7 Sleekbook last week and upgraded from 8.0 to 8.1 for Windows 8.
Now I have no sound and this is the error message I get:
This device cannot start. (Code 10) Status Device Power Failure (for Intel (R) Audio Display)
under Sound, Vieo and Game Controllers in the Device Manager.
Anyone else having this issue after upgrading?
Getting a new lappy is stressful enough but to alreay have issues is ridiculous
If the upgrade is not the issue could something have happened in transit? (I have an issue with the way Best Buy packed it for shipment and wonder if it could have been compromised)
Any help is appreciated. Or should Ibe taing this back to best buy and have them address it?
Thanks
Pam

Ahmed, if your HP Envy has an Intel processor chances are it will be necessary to download new drivers for both sound and chipset due to compatibility issues with Windows 8.1. After 4-1/2 hours on the phone with various technical agents and a lot of frustration I finally got one who had the knowledge and training to resolve my issue. I believe he downloaded the new drivers from the HP support site. Good luck!!

How can I measure RPM with CTR-500 module?

I have used the CTR-500 module for mesurement of motor RPM. But it doesn't have direct option to measure RPM ,
so i have count pulses for 1sec (then reset the counter) and by calculation show the result for 1min. But it varies every time ,cant give me fix RPM.
I want reliable solution for this.

min
You have not said how much the RPM actually varies from reading to reading and what the range of measured RPM is for the process. This variation can be caused by a couple of things. One would be actual variations in RPM due to changes in motor loading. What is this motor driving? Most RPM readouts use some form of sample averaging to smooth out the readings.
A second cause could be your vi. Suggest you post a copy of your vi.
In case you have not seen it, here is a link to a KB about measuring frequency with cFP. It also links to several other docs on the same subject . http://digital.ni.com/public.nsf/allkb/D8DB42F9FDC3607E862568640047F144?OpenDocument

FP-CTR-500 and Frequency Measurement: How to modify it to report the frequency (0-10 Hz) every one minute?

How to modify "Frequency Measurement" to report the frequency every one minute?
The signal frequencies vary from 0 to 10 Hz (see the analog output plot and attached sample data file), so I want record the average frequency every one minute.
Software: Labview 8.5
Hardware: FP-CTR-500
Program: "Frequency Measurement" --build in and under "NI example finder", It was attached with this message.
Physical wiring: (1) The signal I want to measure to count input 1 (pins 2 and 18). it is a pulse signal (range from 0 to 1 V, see the plot and attached data file).
(2) Wire Output 0 (pin 130 to gate 0 (pin 9). Do com pins 26 and 30 need to wire together?
FP-CTR-5000 was set up in Max based on the program instructions. I have tried different gating pulse frequency, my readings are always "0".
Attachments:
H2O_20130809.xlsx ‏18 KB
Frequency Measurement.vi ‏35 KB

CTR-500 high pulse is >=10V. Hence, it always read your pulse as low. With this low voltage pulse, you must use analog input module, and write a program to read pulse from analog level. You must also make sure that you pulse is not so narrow that cFP loop is not fast enough to capture voltage change.

Difficulty in reading GPIB device(power meter)

I am using the following Vi attached. i am generating array of frequency writing it to the signal generator with GPIB address 28.afterawards reading powermeter with GPIB address.and finally writing it to the file.
the problem is some times this GPIB read does not work properly. i get error from the power meter. in the read array it displays trigger or Nrvs or some thing different. i thought may be it is due to initializing of power meter. i send SC1 command for power meter initialization. but it does not work. why ? i attached the manual of power meter and signal generator.
thanks for some help
Attachments:
27_10.zip ‏57 KB
manual.zip ‏13855 KB

yes you are right.but if i just execute this driver and afterwards i execute my VI i get some reading from power meter in the form of an string array. it is like this i write an array of frequencies to signal generator at GPIB address 28.and then other device(power meter) is connected at GPIB address 13.
this device returns reading in the form an array string. i thought that i must send/write some command to GPIB 13 device (power meter), so that it starts sending data.this is i am doing in my VI by sending SC1 command. may be i am using wrong command or may be i must send some sequence of command.
the problem with executing the driver, that you mentioned is that i have to execute this driver VI all the time just before my VI.if i execute this driver VI/DL
L then every thing is fine and my VI sends and read reading according to my wish. but what happened if all these devices are initialized or reset,my VI does not run any more. and because i dont know which part of this driver VI cause this activation to react, i just have to blindly execute the driver every time without understanding what should i do in my VI that i dont need to execute the driver any more and this VI would be independent of driver VI.
thanks

Problem resetting count on read with fp ctr-500 counter

Using the ctr-500 module with a FP-1000. I want to reset the count of a channel on each read. The CTR-500 manual says to selecting "Reset on Read" from the Value menu. I've done that but the counter never resets when I read it. I then tried clicking on "Creat item" under channel attributes in MAX. It creates an item called "Read Reset Mode @Count Input 0" under Data Neighborhood. Added that item to the program and wrote to it with both a 1 and 0, but when I read channel 0 it still will not reset. Obviously, I'm missing something. I would appreciate any help or a simple example so I can get this resolved. Thanks, Mike
Message Edited by mike72903 on 01-31-2008 10:51 AM
Attachments:
reset count1.vi ‏15 KB

Found an example. Thanks anyway

Frequency in cFP CTR 500

Hi, I got a VI to read frequency from cFP 2020 with the CTR-500 module (Frequency Measurement.vi) in NI Example Finder. When I run this VI in LabVIEW for Windows, it's all right. But I want to run it embedded selecting the target and, when I do it, I cannot read the frequency. Does anybody knows what could be happening? Thanks

Hi letreca,
I took a look at your code and it doesn't look like
anything is really wrong there. There was one thing that I think might
help you. Because you do not have any sort of data dependencies, you
could be causing a condition where you are resetting the counter before you
read it. The best way to change this would be to connect the error out of
the Read.vi with the error in of the Write.vi.
You mentioned in your first post that you were using
Frequency Measurement.vi from the example finder (Browse > Hardware Input
and Output > FieldPoint > Advanced); however, the code for frequencia.vi
looks completely different. If you run the example do you get the same
behavior?
I think you may be having an issue mentioned in the first
paragraph because you may be resetting the counters too early. Try the
example and if that works, use the same technique. If that doesn't work,
then try to modify your existing code as described. If neither works tell
me what has changed and what hasn't so I can try to take a closer look into
everything.
Regards,
Otis
Training and Certification
Product Support Engineer
National Instruments

CTR-500 field-device power

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