Siemens CU230P-2 HVAC Parameter Manual page 614

Faults and Alarms
List of Faults and Alarms
A07200 Drive: Master control ON/OFF1 command present
Reaction: NONE
Acknowledge: NONE
Cause: The ON/OFF1 command is not 0, either via binector input p0840 (current CDS) or in control word bit 0 via the master
control.
Remedy: Both the signal at binector input p0840 (current CDS) and bit 0 via the master control must be 0.
F07220 (N, A) Drive: Master control by PLC missing
Reaction: OFF1 (NONE, OFF2, OFF3, STOP2)
Acknowledge: IMMEDIATELY
Cause: The "master control by PLC" signal was missing in operation.
- interconnection of the binector input for "master control by PLC" is incorrect (p0854).
- the higher-level control has withdrawn the "master control by PLC" signal.
- data transfer via the fieldbus (master/drive) was interrupted.
Remedy: - check the interconnection of the binector input for "master control by PLC" (p0854).
- check the "master control by PLC" signal and, if required, switch in.
- check the data transfer via the fieldbus (master/drive).
Note:
If the drive should continue to operate after withdrawing "master control by PLC" then fault response must be param-
eterized to NONE or the message type should be parameterized as alarm.
F07311 Bypass motor switch
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: Fault value: Bit field BYPASS_CONTACTOR_ERROR_STATE
Bit 1
BYPASS_CONTACTOR_ERR_FBK_ON_MISSING
Switch "Closed" feedback signal missing
Bit 2
BYPASS_CONTACTOR_ERR_FBK_OFF_MISSING
Switch "Open" feedback signal missing
Bit 3
BYPASS_CONTACTOR_ERR_TOO_SLOW
Switch feedback signal too slow:
After switching, the system waits for the positive feedback signal. If the feedback signal is received later than the
specified time, then a fault trip (shutdown) is issued.
Bit 6
BYPASS_CONTACTOR_ERR_BYPASS_INCONSISTENCY
Drive switch feedback signal is not consistent with the bypass state:
When powering up or for STAGING, the drive switch is closed.
See also: p1260 (Bypass configuration), r1261 (Bypass control/status word), p1266 (Bypass, control command),
p1267 (Bypass changeover source configuration), p1269 (Bypass switch feedback signal), p1274 (Bypass switch
monitoring time)
Remedy: - check the transfer of the feedback signals.
- check the switch.
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SINAMICS G120 Control Units CU230P-2 Parameter Manual (LH9), 11/2009
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