Edge Computing Gateway User Guide: Interface With Inovance PLC Via Modbus RTU Protocol - IOTROUTER
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Edge Computing Gateway User Guide: Interface with Inovance PLC via Modbus RTU protocol

Today, let’s talk about how to interface the EG edge gateway with Inovance PLCs via the Modbus RTU Protocol. 

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1. Connessione hardware

Compatible PLC: Inovance H3U

The Modbus RTU protocol uses serial communication. This example PLC model employs RS232 communication.

2. Parametri di comunicazione del PLC

2.1. Serial Port Parameter Settings

Fornito dal tecnico del PLC.

The serial port parameters for this Inovance PLC are:

Baud Rate: 57600

Data Bits: 8

Stop Bits: 1

Parity Bit: NONE

3. Configurazione del gateway

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:

Protocollo: Select Modbus RTU

Serial Port: RS232

Baud Rate: 57600

Data Bits: 8

Stop Bits: 1

Parity: None

Timeout: -1

Series: H3U

ID stazione: 0x0B

Format: ABCD

Interface with Inovance PLC via Modbus RTU protocol02

3.2. Configurazione del punto dati

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.

I punti dati sono in genere forniti dai tecnici dei PLC. Dopo aver ottenuto l'elenco dei punti, compilare i punti dati secondo il formato richiesto dal gateway. Per dettagli specifici sulla mappatura, consultare:

This section contains a Yueque content card. Click the link to view:(È possibile utilizzare Google Chrome per la traduzione.) 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:

Interface with Inovance PLC via Modbus RTU protocol01

3.3. Test

Click Deploy and observe that data is printed every 2 seconds. The read data point results are: D6000:0 D6002:0. Communication successful!

Interface with Inovance PLC via Modbus RTU protocol03

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