Siemens SIMATIC S7-1500 Function Manual page 251

OPC UA communication
9.4 Using the S7-1500 CPU as an OPC UA client
Connection parameter assignment using an example:
The plant produces blanks in a production line.
The following controllers are used:
1. An S7-1511 CPU serves as the controller of the production line.
The controller is named "Productionline" in the example.
The OPC UA server of the controller is enabled.
The CPU has the IP address 192.168.1.1 in the example.
This CPU publishes the values of following tags via the OPC UA server:
– NewProduct
– ProductNumber
– Temperature
In addition, this CPU provides the following writable tag:
– ProductionEnabled
In addition, this CPU provides the following method via the OPC UA server:
– OpenDoor.
2. An S7-1516 CPU controls the interaction with other production lines.
This CPU is named "Supervisor" in the example.
The OPC UA client of this CPU is enabled.
Using OPC UA, this CPU can read the NewProduct and ProductNumber tags, set the
ProductionEnabled tag and call the OpenDoor method.
The CPU has the IP address 192.168.1.2 in the example.
250
The tag has the data type "BOOL".
When this PLC tag has the value TRUE, the production line has processed a blank.
The blank is ready for pick-up.
This tag contains the identification number of the blank.
The tag has the data type "Int".
This tag contains temperature values recorded during the production of the blank.
The tag is an array with elements of the "Real" data type.
The tag is set by the OPC UA client.
The tag has the data type "BOOL".
If the value is set to TRUE, the production line is released and may produce blanks.
OPC UA clients can hereby arrange for an access door to be opened to the production
line.
Function Manual, 11/2019, A5E03735815-AH
Communication