Chapter 5 Functional principle
5.1 Internal processing of the measurement values
Diagram of the internal processing of the measurement values
1 Filter to compensate for brief signal
fluctuations (see "Filter module" on page
27). The filter module is operated
permanently.
7 Determination of the setpoints, (see "Control
2 Monitoring of the measurement range limits
(see "Overflow module" on page 27)
8 As the record interval and measurement cycle
can be selected individually, the
measurement values and setpoints are not
recorded at the time of every measurement
(see "Record module" on page 32).
3 Rescaling from the raw value to the
measurement value (see "Scale module
(inputs)" on page 28)
9 Specification of the setpoints for the outputs
(see "Setpoint module" on page 34)
4 Decay module to summarise several
measurement values (see "Decay module" on
page 29)
10 Rescaling from the setpoint to the physical
size for the output (see "Scale module
(outputs)" on page 35)
5 Module to maintain the last valid value in the
event of invalid measurement values (see
"Hold module" on page 30)
11 This module chain is started at the time of
every measurement and is completed once.
For universal inputs that are operated in
digital or digital LP mode, this module chain
(with exception of the control module) is also
executed at second intervals to be able to
react to level changes as quickly as possible.
6 Monitoring of the alarm limits and trigger
levels (see "Alarm/trigger module" on page
30)
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