Reaction When Bus Interruption Is Rectified Or Dp Slave Is Again Addressable - Siemens SIMATIC S5 Manual

IM 308-C – starting ET 200
11.2.5 Reaction when bus interruption is rectified or DP slave is again
addressable
Reaction
Table 11-8 Reaction when bus interruption is rectified or DP slave is again addressable
Failed
DP slave(s):
Response Error- The inputs in the CPU are set to "0". The outputs of the
moni- reporting DP slaves are ...
toring toring mode mode
Response monitoring
1
No QVZ / ... set to the last value prior to the interruption and then
None updated.
1
No PEU ... set to the last value prior to the interruption and then
updated.
1
Yes QVZ / ... updated as again.
None
1
Yes PEU ... updated as again.
1
: At least one DP slave must be configured for this error-reporting mode.
11-14
The table below shows the reactions when bus communication is
reestablished or a failed DP slave is again addressable. The reactions depend
on the error-reporting mode selected.
Note
If bus communication with a DP slave is interrupted, the DP slave fails or,
for example, the bus connector of the IM 308-C is pulled, there is a
possibility of the most recently received data losing its consistency.
The same applies when bus communication is reestablished or the DP slave
is again addressable.
Remedy: If you require consistent data, you must re-address the data.
Failed
DP slave
Reaction of failed DP slave(s):
Response monitoring time not yet
time expired:
... set to the last value prior to the
interruption and then updated.
... set to the last value prior to the
interruption and then updated.
Remaining DP slave
Reaction of remaining
The inputs in the CPU
are updated as before.
The outputs on the DP The o tp ts on the DP
slaves are ...
expired:
... updated as before.
... updated as again.
... updated as before.
... updated as again.
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a
DP slaves: