Monitoring function
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Monitoring function
The Monitoring function allows operating states to be monitored.
It allows observation of a monitored value to detect it exceeding or falling below definable threshold
values. This also provides a way of monitoring sensors for short circuits or lead breaks.
The use of two monitored values allows the differential between both values to be observed. This
too can be used to monitor sensors for short circuits or lead breaks.
Examples of use in the case of faulty characteristics: triggering of an error message, blocking a
faulty function by means of its Enable.
General enabling of the function (digital value ON/OFF)
Analogue input signal for monitored value A
Optional: Analogue input signal for monitored value B for differential
monitoring
Analogue value specifying the lower threshold of the monitoring range
Analogue value specifying the upper threshold of the monitoring range
➢ The monitored values can come from sensors, or from other sources (such as output
variables of functions, CAN inputs, etc.).
Available for selection: Range, Minimum, Maximum
A wide range of function quantities are available, which are applied
together with their unit and their decimal places.
Minimum value
(shown only for Range
and Minimum monitoring)
Diff. on
Diff. off
Minimum value delay
Display of the Minimum value input variable
Start differential for minimum value
Stop differential for minimum value
Enter the delay for the minimum value after which a error message
should be issued
Maximum value
(shown only for Range
and Maximum monitoring)
Diff. on
Diff. off
Maximum value delay
Display of the Maximum value input variable
Start differential for maximum value
Stop differential for maximum value
Enter the delay for the maximum value after which a error message
should be issued
➢ In the Range mode, both the minimum value and the maximum value will be monitored.
➢ In the Minimum mode, only the minimum value will be monitored; in the Maximum mode,
only the maximum value.
➢ If two monitored values are specified in the input variables, the minimum and maximum
values refer to the difference between the two monitored values.
➢ The delay is applied only for switch-on of the Error output variables, Minimum value error
or Maximum value error. When the value returns under/over Diff. off, no delay is applied.