Siemens SINAMICS G120 List Manual page 1083

13: DI/DO 13 (X132.10)
14: DI/DO 14 (X132.12)
15: DI/DO 15 (X132.13)
Regarding the terminal designation:
The first designation is valid for CU320, the second for CU305.
Remedy: - set the terminal as input (p0728).
- de-select the measuring probe (p0488, p0489, p0580).
A07352 Drive: Limit switch signals not plausible
Message class: Application/technological function faulted (17)
Reaction: NONE
Acknowledge: NONE
Cause: Limit switch signals are not plausible.
Possible causes:
- BICO interconnections are not OK (p3342, p3343).
- sensors are not supplying a valid signal (both supply a 0 signal).
Remedy: - check the BICO interconnections for the limit switch signals.
- check the sensors.
See also: p3342 (Limit switch plus), p3343 (Limit switch minus)
A07400 (N) Drive: DC link voltage maximum controller active
Message class: Application/technological function faulted (17)
Reaction: NONE
Acknowledge: NONE
Cause: The DC link voltage controller has been activated because the upper switch-in threshold has been exceeded (r1242,
r1282).
The ramp-down times are automatically increased in order to maintain the DC link voltage (r0070) within the
permissible limits. There is a system deviation between the setpoint and actual speeds.
When the DC link voltage controller is switched out (disabled), this is the reason that the ramp-function generator
output is set to the speed actual value.
See also: r0056 (Status word, closed-loop control), p1240 (Vdc controller configuration (vector control)), p1280 (Vdc
controller configuration (U/f))
Remedy: If the controller is not to intervene:
- increase the ramp-down times.
- switch off the Vdc_max controller (p1240 = 0 for vector control, p1280 = 0 for U/f control).
If the ramp-down times are not to be changed:
- use a chopper or regenerative feedback unit.
A07401 (N) Drive: DC link voltage maximum controller deactivated
Message class: Application/technological function faulted (17)
Reaction: NONE
Acknowledge: NONE
Cause: The Vdc_max controller can no longer maintain the DC link voltage (r0070) below the limit value (r1242, r1282) and
was therefore switched out (disabled).
- the line supply voltage is permanently higher than specified for the power unit.
- the motor is permanently in the regenerative mode as a result of a load that is driving the motor.
Remedy: - check whether the input voltage is within the permissible range (if required, increase the value in p0210).
- check whether the load duty cycle and load limits are within the permissible limits.
SINAMICS G120 CU250S-2 Control Units
List Manual, 09/2017, A5E33842890
4 Faults and alarms
4.2 List of faults and alarms
1083