Siemens SIMATIC ET 200AL, System Manual

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PROFIenergy
6.4 Behavior of the digital inputs of the counters
Digital input/Digital output module DIQ 16x24VDC/0.5A 8xM12 (6ES7143-5AH00-0BA0)
84
Equipment Manual, 08/2021, A5E38688112-AD
6.4 Behavior of the digital inputs of the counters
Display
The channel status LEDs are directly influenced by the signal level at the socket.
If the encoder supply is switched off, this causes the channel status LEDs to also switch off.
Response to error detection
All channels that are in pause mode on "PE_MODE_PROCEED" report their diagnostic status as
in productive mode.
The following applies for all channels which switch to a different pause mode:
•
Encoder supply switch-off upon the start of "pause" does not result in the "Short-circuit"
alarms.
• During the "pause", error detection of "Short circuit" is not possible:
– Alarms for errors already pending before the "pause" are retained.
– After the "pause" is over, the error status is updated and incoming/outgoing errors are
reported correspondingly.
Note
Channels of a counter
All the channels that belong to a counter must have the same PROFIenergy behavior.
If substitute value behavior is parameterized, this also has to be the same for all channels of a
counter.
If the PROFIenergy behavior is not the same for all the channels of a counter, the module
rejects the PROFIenergy parameterization.
Further information on the assignment of the counting channels for the configuration
method 2xCount is available in the section Pin assignment (Page 33), for the configuration
method 4xCount in the section Pin assignment (Page 53).
Mode parameter
The following table shows the "Mode" parameter.
Table 6- 3 Mode parameter
Element Code Explanation
Mode 0
D
: PE_MODE_PROCEED The counter functions as in the normal count mode.
The count output depends on the count value.
1
D
: PE_MODE_SHUTDOWN The count value is no loner updated.
The count output is set to 0.
3
D
: PE_MODE_LAST_VALUE The count value is no longer updated (the input does not
supply any edges).
The count output contains the last value, since the count is
no longer updated.
4
D
:
PE_MODE_SUBST_VALUE
The count value is no longer updated (the input does not
supply any edges).
The count output is set to the parameterized substitute val-
ue, irrespective of the count value.