[IvicaD]

That is a good idea! I tried it on port 80, but I plan to scan the ports.

[IvicaD]

Unfortunately there is not such documentation. It is probably faulty device or not a standard Modbus.

[IvicaD]

Here it is: https://www.aliexpress.com/item/8-way-network-relay-IP-Ethernet-access-controller-TCP-MODBUS-8-in-8-out-of-the/32623288466.html?spm=a2g0s.9042311.0.0.60f54c4dLsFPIj

[IvicaD]

I managed to figure out the registers. Coils are at 16-23 and inputs are at 32-39.

[IvicaD]

This is what I recieve when I switch to Modbus RTU:

2018-06-03 11:28:10 Communication session with the Device 61 “8IN8OUT Controller”, type: KpModbus, address: 1, call number: 192.168.0.105
Request element group “Inputs”
Send (8): 01 02 00 20 00 08 78 06
Receive (5/5): 48 48 43 2D 4E
Incorrect device address!
Request element group “Inputs”
Send (8): 01 02 00 20 00 08 78 06
Receive (5/5): 2D 38 49 38 4F
Incorrect device address!
Request element group “Inputs”
Send (8): 01 02 00 20 00 08 78 06
Receive (0/5):
Communication error!

2018-06-03 11:28:13 Disconnect from 192.168.0.105

2018-06-03 11:28:13 Stop communication line 6 “ModbusPRC”

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