Today, let’s talk about how to interface the EG edge gateway with Inovance PLCs via the Modbus RTU Protocol.
The article we discussed before:
How to integration EG edge computing gateway with General Electric PLC
How to integration with Xinjie PLC via Modbus RTU protocol
How to interface with Keyence KV-8000 series PLCs via the MC-3E protocol
How to interface with Keyence KV-7500 series PLCs via the KV TCP protocol
How to interface with Panasonic PLCs via Mewtocol TCP Protocol
1. Hardware Connection
Compatible PLC: Inovance H3U
The Modbus RTU protocol uses serial communication. This example PLC model employs RS232 communication.
2. PLC Communication Parameters
2.1. Serial Port Parameter Settings
Provided by the PLC engineer.
The serial port parameters for this Inovance PLC are:
Baud Rate: 57600
Data Bits: 8
Stop Bits: 1
Parity Bit: NONE
3. Gateway Configuration
3.1. PLC Connection Setup
Drag an Inovance node from the left pane. Double-click to open the settings page and configure as follows based on the PLC’s serial parameters:
Protocol: Select Modbus RTU
Serial Port: RS232
Baud Rate: 57600
Data Bits: 8
Stop Bits: 1
Parity: None
Timeout: -1
Series: H3U
Station ID: 0x0B
Format: ABCD
3.2. Data Point Configuration
Enter the data points to be read into the parameter list of the Inovance node. Once configured, the node will automatically read data from the PLC at the specified frequency.
Data points are typically provided by PLC engineers. After obtaining the point list, fill in the data points according to the gateway’s required format. For specific mapping details, refer to:
This section contains a Yueque content card. Click the link to view:（You can use Google Chrome for translation） https://iotrouter.yuque.com/zn3vdn/eg8000/dqdvyosc5vubd2rv
This example reads data from addresses D6000 and D6002. In the parameter list, enter the address/name/data type in sequence. The data is read cyclically every 2 seconds, as shown in the figure:
3.3. Testing
Click Deploy and observe that data is printed every 2 seconds. The read data point results are: D6000:0 D6002:0. Communication successful!
