We have a test machine using a CAL 9500 P temperature Controller using Modbus RTU. Temperature is defined as a 001C Hex address. We set up our modbus to have a variable 300028 (input register with 028 as the decimal for 001C) We linked it to the network address 300001-6XXX un16bit. We are trying to read temperature on a numeric display. The Master and the slave are clearly communicating since we aren't getting an error, but we aren't getting a value for the return. Any suggestions?

Industrial Communications

I have a Cal 9500p, I would like to use LabVIEW to read/write to the holding registers to control the Cal 9500.

Can you provide any help.

Thanks in advance .

RgL

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