Modbus extension

[litdev]

Hi,

I did a bit more investigation and added modbus to LitDev extension - it could be useful for other devices.

You need updated Beta version of LD extension (1.2.30.8) from Extension Manager or website (https://litdev.uk/#Extensions).

This is my test example (Serial untested).

Code:

'Tested using EasyModbusTCP Server Simulator, https://sourceforge.net/projects/easymodbustcp

LDModbus.ConnectTcp("127.0.0.1", 502)

LDModbus.WriteCoil(1,3,"True")
result = LDModbus.ReadCoils(1,1,5)
TextWindow.WriteLine(result)

result = LDModbus.ReadInputs(1,1,5)
TextWindow.WriteLine(result)

LDModbus.WriteRegister(1,3,200)
result = LDModbus.ReadHoldingRegisters(1,1,5)
TextWindow.WriteLine(result)

result = LDModbus.ReadInputRegisters(1,1,5)
TextWindow.WriteLine(result)

Output using Modbus simulator:

1=False;2=False;3=True;4=False;5=False;
1=False;2=False;3=False;4=False;5=False;
1=0;2=0;3=200;4=0;5=0;
1=0;2=0;3=0;4=0;5=0;