Siemens ULTRAMAT 6 Manual page 110

4.2.6 Warning and Alarm Limits
The function blocks of the analog input have upper and lower warning and alarm limits for the output.
To avoid unstable display of the warnings and alarms, you can specify a hysteresis.
Set the following parameters according to the process conditions in the analog input function blocks:
Hysteresis limit value
•
Upper warning limit
•
Upper alarm limit
•
Lower warning limit
•
Lower alarm limit
•
On exceeding the limits, the output is accompanied by a status value which you can evaluate in your
application program. The following figure shows an overview of the individual limit values.
Alarm_top
Warning_top
Warning_bottom
Alarm_bottom
Upper_alarm limit
Upper_warning limit
Lower_warning limit
Lower alarm limit
ULTRAMAT 6 / OXYMAT 6 / CALOMAT 6 / ULTRAMAT 23 / OXYMAT 61
Schnittstelle PROFIBUS DP / PA Interface
A5E00054148-03
Hysteresis
Hysteresis
Hysteresis
Hysteresis
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