Siemens SINAMICS PERFECT HARMONY GH180 - Timers for Drive Operation in Cell or Transformer Over-Temperarure

If the motor current rating is less than the drive rating, then the drive displays this rollback as
TLIM for torque limit on the keypad and in the ToolSuite. However, when the drive current rating
is less than the motor rating, the drive displays C OL for cell overload.
Note
Power cell overload capability
The power cells used in the drives do not have a 󹪝xed overload capability.
Consult Siemens customer service to determine the level of overload capability for a speci󹪝c
power cell.
Parameter for Cell Current Overload
Refer to Input Protect Menu (7000) in Section Options for Drive Protect Menu (7) of
Chapter Parameter Assignment / Addressing for the parameter associated with this function:
• Cell Overload Level (7112)
7.10.8 Timers for Drive Operation in Cell or Transformer Over-temperarure
Independent cell and transformer over-temperature (OT) timers will determine the length of
time that temperature alarms (in conditions that cause rollback) have been active. This is
important to record the length of time that overheating has occured on a drive.
The timers record the accumulative duration of multiple cell OT and transformer OT alarms. The
timers accumulate, with one second resolution, the amount of time that at least two cell OT or
the single transformer (󹪝rst level) alarms are active while the drive is in operation.
The timers record cumulative time similar to the kWHr recorder. The timers activate on over-
temperature alarm conditions regardless of whether the rollback feature is active or not, and
only when the drive is running.
• The cell alarm timer will accumulate time when two or more cell OT alarms are active.
• The transformer alarm timer will accumulate when the lower alarm level 1 is active.
These timers are updated in the slow loop with the timers incremented by the slow loop sample
period whenever the conditions are met to count as described above.
The time stamp for going into and coming out of thermal limit is recorded in the event log. The
timers are viewable from the Drive Tool and the keypad. The timers are not available via the
network.
To display the timers or other timer functions, refer to the Thermal OT rollback menu (7170).
Operating the Control
7.10 Drive Output Torque Limiting
NXGPro+ Control Manual
Operating Manual, A5E50491925A 217