Siemens SIMATIC ET 200AL System Manual page 448

7.2 DI operating mode
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
Mode parameter
The following table shows the "Mode" parameter.
Table 7- 1
Element Code
Mode
As there is only one encoder supply U
1
"pause" if all channels are configured to switch off.
Digital input/digital output module DIQ 4+DQ 4x24VDC/0.5A 8xM8 (6ES7143-5BF00-0BA0)
Equipment Manual, 08/2021, A5E32349882-AD
reported correspondingly.
Mode parameter
0 : PE_MODE_PROCEED
D
1 : PE_MODE_SHUTDOWN
D
3 : PE_MODE_LAST_VALUE
D
4 : PE_MODE_SUBST_VALUE
D
Explanation
Proceed at "pause"
• Value status "GOOD"
Switch off at "pause"
• Supply voltage U
• Pause substitute value: 0
• Value status "BAD"
Last value at "pause"
• Supply voltage U
• Pause substitute value: Last input value
• Value status "BAD"
Substitute value at "pause"
• Supply voltage U
• Pause substitute value: Configured pause substi-
tute value
• Value status "BAD"
for all channels, the supply can only be switched off at
S
PROFIenergy
7.2 DI operating mode
switched off
1
S
B
switched off
1
S
switched off
1
S
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