Siemens Simatic CFU, Commissioning Manual

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5.3.3 Reaction to violation of the high counting limit
Introduction
If the "Counter" mode is configured for a digital input, the counting range can be configured.
Note
Counting range
For the CFU, only the high counting limit of the counting range can be parameterized.
Requirements
● The SW gate is open.
● When the HW gate is used: The HW gate is open.
Behavior
The following table shows the counting behavior depends on the setting of the parameter
"Reaction to violation of the high counting limit".
Table 5-2 Reaction to violation of the high counting limit
Parameter Setting Description
Reaction to violation
of the high counting
limit
Stop counting With this parameter setting, the counter records the pulses until the high count‐
ing limit is exceeded. The internal gate is closed automatically.
Note:
You have the following possibilities to restart the counting process:
● Close and open SW gate.
● When HW gate is activated: Close and open HW gate.
Continue counting With this parameter setting, the counter records the pulses. When the high
counting limit is exceeded, the counter reading is automatically set to 0. The
counter continues the counting process with the next pulse.
The internal gate remains open.
Additional information
Section "Loading the count value (Page 44)"
5.3.4 Behavior when the comparison value is reached (status bit STS_DQ and output
DQ)
You can specify a value within the counting range for which a comparison with the counter
reading is carried out.
Operating modes and functions
5.3 Counting
SIMATIC CFU
Commissioning Manual, 08/2019, A5E39252870-AD
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