Siemens SIMATIC ET 200AL, System Manual

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PROFIenergy
7.2 Behavior of the digital input module
DI 16x24VDC 8xM12 (6ES7141-5AH00-0BA0)
Equipment Manual, 08/2021, A5E36681813-AB
25
7.2 Behavior of the digital input module
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.
Mode parameter
The following table shows the "Mode" parameter.
Table 7- 1 Mode parameter
Element Code Explanation
Mode 0
D
: PE_MODE_PROCEED Proceed at "pause"
•
Value status "GOOD"
1
D
: PE_MODE_SHUTDOWN Switch off at "pause"
•
Encoder supply U
S
switched off
1
• Pause substitute value: 0
B
• Value status "BAD"
3
D
: PE_MODE_LAST_VALUE Last value at "pause"
•
Encoder supply U
S
switched off
1
• Pause substitute value: Last input value
• Value status "BAD"
4
D
: PE_MODE_SUBST_VALUE Substitute value at "pause"
•
Encoder supply U
S
switched off
1
• Pause substitute value: Configured pause substi-
tute value
• Value status "BAD"
1
As there is only one encoder supply U
S
for all channels, the supply can only be switched off at
"pause" if no channel is configured in PE_MODE_PROCEED.