I am having trouble getting a modbus slave to communicate with a Unipi Neuron.
The slave unit is a Parker inverter drive.
I have been trying to read a single holding register:
slave address 01
function code 03
read offset 1004
I can read the register fine using a different device (programmed via codesys) but the unipi does not seem to be getting a response.
I am writing '13' to 'Neuron S10x_UART_config_1.01' to set baud at 9600
Watching the port monitor shows the sent message looks correct but it times out with no response. the timeout is set to 1000ms.