Hi everyone !
I am working on a project for my thesis and a part of this one is to displays the data received from the sensors on the graphical interface using the red node.
I have successfully built the project for PLC and it works, but I can't read this that through the modbus and display them. The project was built in Ecostruxure SOMachine HVAC.
When I am trying to connect to my PLC I displays and error that says "sequential dequeue command not possible".
Could someone help me to solve this ?
I will leave some screenshots with the settings.
Thank you in advance for any help.
I'll provide more info if anyone needs it.
P.S. Used PLC - Modicon TM172PDG18R
P.S.S. When I write address 8960 it retrieving me this response but I don't really know what kind of data are this.
23.06.2020, 03:51:43[node: c072310d.48e5b](http://192.168.1.104:1880/#)msg.payload : Object object data: array 0: 0 1: 0 2: 220 3: 100 buffer: buffer[raw](http://192.168.1.104:1880/#) 0: 0x0 1: 0x0 2: 0x0 3: 0x0 4: 0x0 5: 0xdc 6: 0x0 7: 0x64
8960 is the address of a status variable, when I try for another address it displays:
"Error: Modbus exception 2: Illegal data address (register not supported by device)" "TypeError: Cannot read property 'status' of undefined"