We will connect two Click PLUS PLCs and communicate in three different ways. Using the send and receive commands, we will set up one PLC to be the master (client) and communicate with the slave (server). WiFi, Ethernet, and Serial communication will share common memory areas between the Click PLCs.
The send and receive commands have been covered before in our Click PLC Series, but we will look further at the timing of the communication. Detecting and correcting communication errors will be discussed and implemented. We will also create a heartbeat for the remote Click slave (server) PLC. This will allow the remote controller to determine if communications have stopped with the Click master (client). Wiring a pushbutton and some ladder logic code will allow us to time the throughput of each of the communication methods. Let’s get started.
More information can be obtained at our website. This includes all of the links mentioned in this video. https://accautomation.ca/click-to-click-plc-communication-remote-io/
00:00 Click to Click PLC Communication
01:22 What is PLC to PLC Communication?
04:14 Click to Click Remote IO Hardware
06:01 Send and Receive Command Timing
07:55 Click to Click RS485 Modbus RTU
17:10 Click to Click Ethernet Modbus TCP
26:55 Click to Click WiFi Wireless Modbus TCP
Previously we looked at the following:
Click Plus Software Installation
https://accautomation.ca/click-plus-software-installation-version-3-00/
https://youtu.be/6uQQzyZ-O3s
Establish Communication
https://accautomation.ca/click-plus-establish-communication/
