ngocphonghd92

MODBUS RTU :please help me find cause ,I can't read PV temperature NX4 by

3 posts in this topic

Hello every one.I tried commiucation modbus rtu by Rs Instruction throught FX 1n 485 Bd board

I already setting Sv teperature completed, but when I tried read PV temperature, I can't do that

This is my code ,and format of Nx4 temperature ,everyone show me the cause ,I can't do succesfully .Thanks all

code1.PNG

code2.PNG

D register.PNG

example fomat.PNG

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Thanks for your recommend

I succeed
There is only one thing I'm confusing 
Why D20 is not the same as in the example given by the manufacturer

Why received dâta D20-D27 the same data have sent ? not follow the example ,you can see two picture as below

 

 

This is my code 

If you have any question please free contact to me 

Temperature nx4 modbus rtu code.rar

 

 

 

 

 

Register Received.PNG

example fomat.PNG

Edited by ngocphonghd92

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