Siemens CU240B-2 Parameter Manual page 729

C30770 SI Motion P2: Discrepancy error affecting the failsafe inputs
Reaction: NONE
Acknowledge: IMMEDIATELY (POWER ON)
Cause: The fail-safe digital inputs (F-DI) show a different state longer than that parameterized in p10002 / p10102.
Fault value (r0949, interpret binary):
Bit 0: Discrepancy error for F-DI 0
Bit 1: Discrepancy error for F-DI 1
...
Note:
If several discrepancy errors occur consecutively, then this fault is only signaled for the first error that occurs.
Remedy: - check the wiring of the F-DI (contact problems).
Note:
This message can be acknowledged via F-DI or PROFIsafe.
Discrepancy errors of an F-DI can only be completely acknowledged if safe acknowledgement was carried out once
the cause of the error was resolved (p10006 or acknowledgment via PROFIsafe). As long as safety
acknowledgement was not carried out, the corresponding F-DI stays in the safe state internally.
For cyclic switching operations at the F-DI, it may be necessary to adapt the discrepancy time to the switching
frequency.
If the period of a cyclic switching pulse has the order of magnitude of double the value of p10002, then the following
formulas must be checked.
p10002 < (tp / 2) - td (discrepancy time must be less than half the period minus the actual discrepancy time)
p10002 >= p9500 (discrepancy time must be no less than P9500)
p10002 > td (discrepancy time must be greater than the switch discrepancy time which may actually apply)
td = possible actual discrepancy time (in ms) that can occur with a switching operation. This must correspond to at
least 1 SI sampling cycle (see p9500).
tp = period for a switching operation in ms.
When debounce p10017 is active, the discrepancy time is directly specified by the debounce time.
If the period of a cyclic switching pulse has the order of magnitude of twice the debounce time, then the following
formulas should be checked.
p10002 < p10017 + 1 ms - td
p10002 > td
p10002 >= p9500
Example:
For a 12 ms SI sampling cycle and a switching frequency of 110 ms (p10017 = 0), the maximum discrepancy time
which can be set is as follows:
p10002 <= (110/2 ms) - 12 ms = 43 ms
Rounded-off, p10002 <= 36 ms is obtained (since the discrepancy time can only be accepted as a whole SI sampling
cycle, the value will need to be rounded up or down to a whole SI sampling time value if the result is not an exact
multiple of an SI sampling cycle).
Note:
F-DI: Failsafe Digital Input
C30798 SI Motion P2: Test stop running
Reaction: NONE
Acknowledge: IMMEDIATELY (POWER ON)
Cause: The test stop is active.
Remedy: Not necessary.
The message is withdrawn when the test stop is finished.
C30799 SI Motion P2: Acceptance test mode active
Reaction: NONE
Acknowledge: IMMEDIATELY (POWER ON)
Cause: The acceptance test mode is active.
Remedy: Not necessary.
The message is withdrawn when exiting the acceptance test mode.
© Siemens AG 2011 All Rights Reserved
SINAMICS G120 / Control Units CU240B/E-2 Parameter Manual (LH11), 01/2011
Faults and Alarms
List of Faults and Alarms
3-729