I2T Monitoring Alarm Excessive Motor Temperature Rise; Overspeed Threshold Overshot - Siemens SINAMICS DCM List Manual

- EMF too high, because the CEMF crossover voltage was set too high (transition between normal and field
weakening operation).
- replace the ribbon cable from the Allocation Board to the power interface (connector X108).
See also: r52116 (Armature current actual value internal absolute value), r52266 (Field current actual value internal
absolute value), r53190 (Armature auto-reversing stage state), r53191 (Field auto-reversing stage state)
Reaction upon N: NONE
Acknowl. upon N: NONE
Reaction upon A: NONE
Acknowl. upon A: NONE
A60037 (F, N)

I2t monitoring alarm excessive motor temperature rise

Message value: -
Message class: Motor overload (8)
Drive object: DC_CTRL
Reaction: NONE
Acknowledge: NONE
Cause: The I2t calculation shows that the motor's temperature rise is excessive.
The alarm is triggered if the calculated motor temperature rise in r52309 > 100%.
Note:
r50047[1]: Temperature rise r52309
r50047[2]: Motor rated armature current p50100
r50047[3]: Continuous current factor r50113
r50047[4]: Device rated current r50072[1]
r50047[5]: Current armature current r52109
r50047[6]: Motor thermal time constant p50114
See also: p50114 (Motor thermal time constant), r52309 (Calculated motor temperature rise)
Remedy: - Check the ambient temperature and reduce if necessary.
- Reduce the motor load.
See also: r52109 (Armature current actual value averaged over 6 cycles)
Reaction upon F: NONE (OFF1, OFF2, OFF3)
Acknowl. upon F: IMMEDIATELY
Reaction upon N: NONE
Acknowl. upon N: NONE
F60038 (N, A)

Overspeed threshold overshot

Message value: -
Message class: Motor overload (8)
Drive object: DC_CTRL
Reaction: OFF2 (NONE, OFF1, OFF3)
Acknowledge: IMMEDIATELY
Cause: The speed actual value has overshot the threshold for the positive or negative maximum speed.
Note:
Possible cause of the fault, if p50083 = 3 (EMF as speed actual value):
- Interrupted armature circuit (fuse blown, contactor in the DC link has not closed)
In this particular case, the converter output voltage is not equal to the motor armature voltage, which is the reason
why an incorrect speed actual value is determined.
Note:
r50047[1]: Maximum speed for positive direction of rotation (p50380)
r50047[2]: Maximum speed for negative direction of rotation (p50381)
r50047[3]: n_act (connector input p50595)
Remedy: - Reduce the speed.
- Check the threshold for positive or negative direction of rotation and adjust if necessary (p50380, p50381).
See also: p50380 (Messages for overspeed threshold positive direction of rotation), p50381 (Messages for
overspeed threshold negative direction of rotation)
Reaction upon N: NONE
Acknowl. upon N: NONE
SINAMICS DCM
List Manual (LH8), 02/2015, 6RX1800-0ED76
4 Faults and alarms
4.2 List of faults and alarms
1147