RS232 data format

Question

Dear all Dasylab users. I am using Dasylab to connect TSE Syringe pump to PC. I managed to get Dasylab to communicate with my device, but I am having trouble parsing the data effectively. I've been searching the forums and think this has a very simple solution.
I'm just having trouble finding the correct command to put in the "measurement data format" box for each channel. I get a string: <STX>00P900.5MH<ETX> (in RS232 monitor)
(It means 00 channel; P status;900.5 value; MH unit) I tested plenty possibilities but nothing works. I need to get all 4 information. Status and unit to the Global string 11 and 12. I thing the correct measurement data format would be:
Channel 0 - "\x02" 2a
Channel 1 - $11 1a
Channel 2 - 5a
Channel 3 - $12 2a \r\n
but it doesn’t work (numbers are correct but the strings not). I use (for measurement data request) string “RAT\r\n” at Chanel 0, the other channels are empty.
The second problem is when I need second information. I use next Channel (Channel 4) with measurement data request RAT\r\n and measurement data format "\x02" x3 5a \r\n. I get in RS232 monitor string <STX>00P42.48<ETX>. If I use only this one channel (as Channel0) so it works correctly but it doesn’t work with the previous four channels.
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Answer 1

Thank a lot for your help.
Using the "b" instead of "a" helps solve the problem with channel1. But problem with channel3 (UNIT) survive. The string is empty. I can use the same solution as for channel 1(may be, it is even better because I can transfer MH to ml/h) but I would like to know how to send it to the string. (I tested both $12a\r\n and $12a\r strings) It looks, that measuring one time checks the channels 0, 1 and 2 and then waits. (I have action and message box connected to input and if the measuring is correct the messages repeated each 0.5 s (this is a sampling frequency).
I know that is impossible to use the same search string twice, but I don’t know how send next question/string to the equipment. I tested use new channel and also new slave module, no success.
Now, when I have the formats:
Channel
Format
request
answer
0
"\x02" 2a
RAT \r\n
00
1
b
83
2
5a
900.5
3
b
77
4
b
72
Everything is correct. When I add one channel, one times the correct values appears at first 5 channels but then all goes wrong and measuring waits:
Channel
Format
request
answer
0
"\x02" 2a
RAT \r\n
00
1
b
83
2
5a
42.48
3
b
72
4
b
83
5
4x 5a
DIA \r\n
When I use monitor and switch repeatedly Chn.0 and Chn.5 I obtain:
(To CJ Butler: I tried to get data from HyperTerminal, but I am not able to connects the equipment.)