Siemens SIMATIC ET 200AL - Page 251

PROFIenergy
7.2 Behavior of the digital input module
Digital input module DI 8x24VDC 8xM8 (6ES7141-5BF00-0BA0)
24 Manual, 02/2016, A5E32349579-AC
7.2
Behavior of the digital input module
Requirement
You can use the PROFIenergy function when you use the internal encoder supply.
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.