OPC UA communication
9.3 Using the S7-1500 as an OPC UA server
Communication
292
Function Manual, 05/2021, A5E03735815-AJ
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DataType
Explanations
3:ID
UInt16
Alarm number - A number (ID) assigned by the
system that is unique within the CPU and identi-
fies an alarm.
3:DisplayClass
UInt16
Display class (used by HMI devices. Determines
the events displayed on specific HMI devices.
3:GroupID
UInt8
Acknowledgment group for alarms that are
acknowledged together.
Assignment of Priority (SIMATIC) - Severity (OPC UA)
The following table shows how the 17 priorities that you can assign to alarms in the SIMATIC
environment are mapped to the 1000-level Severity with the OPC UA server of the S7-1500
CPU.
This assignment depends on the manufacturer. Different assignments may apply to other
devices.
OPC Range
Priority 0..16 (SIMATIC)
Severity 1..1000 (OPC UA)
HIGH (667 – 1 000)
16
1000
15
930
14
860
13
790
12
720
MEDIUM (334 – 666)
11
650
10
600
9
550
8
500
7
450
6
400
5
350
LOW (1 – 333)
4
300
3
225
2
150
1
75
0
1
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