I will clarify the manufacture of the device is Siemens the product series is called LOGO!
As per the PLC guide the Modbus addressing is as follows
I am able to get RapidSCADA connected (showing connected as server on the PLC) I am able to read inputs/outputs (I&Q) from the PLC
Please see the following capture form the PLC programming application.
The trouble starts if I try and send command 1 which is to enable 8193 (Q1) nothing happens, if I send command 2 it will enable Q2 not problem.
The next issue I also cannot enable the network input NI1, send command 3 and nothing happens
Here are the screenshots from the modbus line configuration from RapidSCADA
Any assistance would be great! I’ve been spending a lot of hours trying to solve this and would really like to use RapidSCADA.