Siemens G130 List Manual page 1616

4 Faults and alarms
4.2 List of faults and alarms
Reaction upon N: NONE
Acknowl. upon N: NONE
F07937 (N) Drive: Speed deviation between motor model and external speed
Message value: -
Message class: Application/technological function faulted (17)
Drive object: VECTOR_G
Component: Motor
Reaction: OFF2 (NONE, OFF1, OFF3)
Acknowledge: IMMEDIATELY
Cause: The absolute value of the speed difference from the two actual values (r2169, r1443) exceeds the tolerance threshold
(p3236) for longer than permitted (p3238).
Possible causes:
- the interconnection or scaling of the external encoder signal is incorrect (p1440, p2000).
- speed encoder for external encoder signal faulty.
- encoder signal's polarity or gain incorrect.
- smoothing time constant for model speed for monitoring too high (p2157).
- smoothing time constant or threshold values for monitoring too low (p3236, p3238).
If an external encoder signal is not being used:
- check speed signal r0061. For significant signal ripple, check the speed encoder and if required increase p0492.
See also: p2149 (Monitoring configuration)
Remedy: - check that the external speed matches the motor speed (p1440, r1443).
- check the polarity of the external speed (r1443).
- check the interconnection of the connector input and the scaling of the signal (p1440, p2000).
Reaction upon N: NONE
Acknowl. upon N: NONE
F07940 Sync-line-drive: Synchronizing error
Message value: -
Message class: Application/technological function faulted (17)
Drive object: VECTOR_G
Component: None
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: After synchronization has been completed, the phase difference (r3808) is greater than the threshold value, phase
synchronism (p3813).
OFF1 or OFF3 response, while the closed-loop phase control is active (r3819.6 = 1) or synchronism reached
(r3819.2 = 1).
Enable signal withdrawn (p3802 = 0), while the closed-loop phase control was active (r3819.6 = 1).
Remedy: If required increase the threshold value phase synchronism (p3813) for synchronizing the line supply to the drive.
Before OFF1 or OFF3, complete synchronizing (r03819.0 = 0).
Before withdrawing the enable signal (p3802 = 0), reach synchronism (r3819.2 = 1).
See also: p3813 (Sync-line-drive phase synchronism threshold value)
A07941 Sync-line-drive: Target frequency not permissible
Message value: Parameter: %1
Message class: Application/technological function faulted (17)
Drive object: VECTOR_G
Component: None
Reaction: NONE
Acknowledge: NONE
Cause: The target frequency is outside the permissible value range.
Alarm value (r2124, interpret decimal):
1084: Target frequency greater than the positive speed limit, f_sync > f_max (r1084).
1087: Target frequency less than the negative speed limit, f_sync < f_min (r1087).
1616
Propagation: GLOBAL
Propagation: GLOBAL
Propagation: GLOBAL
List Manual (LH2), 07/2016, A5E03263479A
SINAMICS G130/G150