Subscription Diagnostics - Siemens SIMATIC S7-1500 Function Manual

OPC UA communication
9.3 Using the S7-1500 as an OPC UA server
Monitored Item Service Set
CreateMonitoredItems
ModifyMonitoredItems
DeleteMonitoredItems
SetMonitoringMode
SetTriggering
Subscription Service Set
CreateSubscription
ModifySubscription
DeleteSubscriptions
Publish
Republish
SetPublishingMode
9.3.6.6

Subscription diagnostics

Information about a subscription
S7-1500 CPUs as of firmware version V2.8 are able to create an entry in the diagnostic
buffer at state changes of a subscription.
The diagnostic buffer displays the new state; exception: "KeepAlive".
Requirement
In the OPC UA properties of the CPU, the option "Subscriptions: Change of status" (OPC UA
> Server > Diagnostics) is selected.
Example
An OPC UA client is connected to an S7-1500 CPU as OPC UA server and generates a
subscription in the server.
The diagnostic options for subscriptions are selected in the OPC UA properties of the CPU.
The "Creating" and "Normal" states are entered one after the other with the corresponding
subscription ID in the diagnostic buffer.
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Function Manual, 11/2019, A5E03735815-AH
Communication