Hello
I have a hard time getting started with Modbus on a HVS 450.

1. In the "Connection" section, I configured Serial Port 1 for my application(Modbus RTU Master, 9600bps, No parity, 1 Stop bit)

2. Under Serial Port 1, I created a Modbus device by clicking "Add Modbus Device". The device is named Remote Slave Device

3. In the Modbus Device, I created a mapping group (named ConsumptionQ) and I created a variable referring to Modbus address 40000 and I am reading a 32 bit long holding register.

4. I reused the "Blink Light" example an inserted Modbus->RefreshMapping Group(Remote Slave Device.ConsumptionQ) in one of the blinking states of the state machine

5. When the program is uploaded I start the blinking but no data is sent from the RS-485 pins on Port D

I do not understand what is missing at this point.

Thanks

Charles

OK I found the problem, the Modbus Address was not entered correctly, it works now.

Thanks

Charles

Hi Charles,

Thank you for letting us know that you found the problem.

Hi Charles,

If you have sample config file which uses MODBUS and serial port configuration , please provide the sample here.