Today, let’s talk about how to interface with Omron PLC via Hostlink protocol.
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1. Connexion du matériel
Compatible PLC: CP Series
The Hostlink protocol uses serial communication. For this example, the PLC model CP1W-0026 uses RS485 communication. Simply connect the PLC’s 485 interface SDA- to the gateway’s B1 pin, and the PLC’s 485 interface SDB+ to the gateway’s A1 pin.
2. PLC Serial Parameters
Note the unit number (station number 1) and baud rate (9600-8-1-E). These parameters will be required for subsequent gateway configuration.
Note: DIP Switch Settings: 1 and 4 (OFF), 2, 3, 5, 6 (NO)
3. Configuration de la passerelle
3.1. PLC Connection Setup
Drag an Omron node from the left panel. Double-click to open the settings page and configure based on the PLC’s serial parameters as follows:
Protocole : Select HostLink
Port série : Select RS485-1 (based on actual hardware connections)
Débit en bauds : 9600
Bits de données : 8
Bits d'arrêt : 1
Parité : EVEN
Station Number: 1
3.2. Configuration des points de données
Enter the data points to be read in the Omron node’s parameter list. Once configured, the PLC data will be automatically retrieved at the set frequency. Data points are typically provided by PLC engineers. After obtaining the point list, enter data points in the format required by the gateway. For specific correspondence, refer to:（You can use Google Chrome for translation） https://iotrouter.yuque.com/zn3vdn/eg8000/skfapgdm7332it5q
In the parameter list, fill in Address/Name/Data Type/Data Length sequentially. Set a 2-second cycle for periodic reading, as shown in the figure:
3.3. Essais
Click Deploy. Observe that a data point is printed every 2 seconds. Verify that the output value matches the actual value. Communication successful!
