Limit value monitoring

You can define two limit values for each measured value. A variable indicates whether the measured value lies above or below the limit value.

Defining a limit value

Enter the limit value in the appropriate CoE object.
Data format: the same data format as that of the measured value to be monitored.

CoE Index

Name

80n0:13

Limit 1

80n0:14

Limit 2

(n = 0 .. 3 for the RTD inputs X01 .. X04)

Activating the monitoring

Set the CoE object for the respective limit value to TRUE:

CoE Index

Name

80n0:07

Enable limit 1

80n0:08

Enable limit 2

Evaluation

Evaluate the input variables "Limit 1" and "Limit 2" in the process data:

Value

Meaning

0

Monitoring is not activated for this limit value.

1

The measured value is smaller than the limit value.

2

The measured value is greater than the limit value.