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Update holding registers of Virtual Modbus Slave device

Posted: 20 Jan 2022, 11:37
by matdog
Hi. I'm using a RevPi compact as a Modbus Slave Device. It's supposed to simulate a slave device.

However, I am unsuccessful in updating the holding registers of the virtual slave device locally. When updating the variables with PiTest, the values appear to the master as Input_registers, not Holding_registers.
I'd like to update the holding_registers of the slave device locally. Is there any command for that?

Re: Update holding registers of Virtual Modbus Slave device

Posted: 21 Jan 2022, 17:26
by dirk
Hi The holding registers can only be read not written.
https://revolutionpi.com/tutorials/modb ... verwenden/