Ned-red work as modbus tcp server communicate with scada application

General
1

Dear Expert
I want to buid node-red as Modbus TCP server to communicate with SCADA.
I need Node-red Mobus TCP server send data to SCADA via FC4 and FC2. And receive command from SCADA with FC3/FC6 and FC1/FC5.
I tried do with Modbus server in contrib modbus tcp pạkage, it seem not support FC4 and FC2
DO anyone have solution
Many thank

2

Can't the scada system do MQTT?

3

To send data (FC2/FC4) to a SCADA is a client like node-red-contrib-modbus

A Server (Slave) sits passively, listening on a specific port (usually 502), waiting for the a Client (Master) to ask for data or command it to change a state.

4

Thank for your reply.
My scada application connected to Node-red via Modbus TCP OK.
I uses Function before input of Modbus Server block like Picture with code: msg.payload = { 'value': [10, 20, 30, 40, 50, 60, 70, 80, 90], 'register': 'input', 'address': 0, 'disableMsgOutput': 0 }; return msg;
With above Code, I can only transmit one Function code into Modbus Server block.
How can I transit multiple fuctioncode value into Modbus server block at the same time?
Many thank

5

Looking at the readme for node-red-contrib-modbus it seems that the server function is being split out into node-red-contrib-modbus-flex-server, but since that has not been updated for a year I don't know whether it is working. You could try that.

6

You did not answer my question asking whether the SCADA system can communicate using MQTT. That would be much easier than trying to simulate a modbus slave device in node-red.

7

Dear sir
Scada only use modbus or iec60870-5-104

8

Dear sir
Do you know other package can work as modbus tcp server?

9

No, have you tried the other one I suggested?