Main Contactor Control Terminal 109/110; E-Stop, Terminal 105/106; Brake Control; Automatic Restart - Siemens SINAMICS DCM 6RA80 Faq

Creeping setpoint: Sheet 3130. Creeping has its own ON function for OFF1 low signal and a
fixed setpoint function when the creeping setpoint is used in the Run state.

Main contactor control terminal 109/110:

Control of the main contactor via terminal 109/110 ensures the correct switch-on and switch-
off sequence of the main contactor, this is therefore the preferred method of implementation.
Main contactor control in the case of setting p51619 = 53051.0 (factory setting should be
retained), see Sheet 2070 in Section 2 of the Parameter Manual:
Terminal 109/110 is closed on ON command. Voltage must now be applied to the power unit.
In the case of Off1, the setpoint before the ramp-function generator is set to zero, the drive
decelerated to speed n<nmin (p50370) along the ramp-function generator ramp, and then the
current is reduced to zero and the controllers and pulses are disabled. Only then will 109/110
open to switch off the main contactor. The voltage on the power unit can now be removed.
For controlling the field supply, see parameter p50082. When the main contactor is controlled
by an external contact, e.g. via the automation, the above conditions must be observed as
otherwise F60004 will occur.
Note: EMC requires that the contactor coil be connected to a suppression element:
For a coil with DC current excitation, with an anti-parallel diode, for AC current excitation with
an RC element.

E-stop, terminal 105/106:

No E-stop, terminal 105/106 closed. If the function is not used, a jumper must be placed
between terminal 105/106.
See Sheet 2070 in Section 2 of the List Manual
If E-stop is pending, the main contactor is switched off immediately via terminal 109/110; only
a slight time delay of 15 ms takes effect to de-energize the drive before the main contactor
drops out.
As the main contactor relay in SINAMICS DCM has no forcibly guided contacts (in the worst
case this means that the relay contact may be welded and therefore does not open), the
failsafe contactor combination 3TK28 must be used if emergency switching-off is
implemented according to EN60204-1. 3TK2825 for immediate switch-off (STO: Safe Torque
Off) and 3TK2827 with delay via the integrated safe time element, e.g., to first execute the
shutdown function in SINAMICS DCM via fast stop (SS1: Safe Stop 1). The normally closed
contacts of 3TK28 are switched in series to the main contactor relay terminal 109/110 to
implement the safety functions. Approx. one contactor switching time should first be
confirmed in the SINAMICS DCM by the E-stop so that the main contactor opens in a de-
energized state and so that F60004 does not occur. If the STO function is used, a main
contactor is always required for the infeed of the SINAMICS DCM or a contactor in the DC
circuit. A pulse inhibit cannot prevent the current flow (motor torque) in case of a power unit
fault. For category 3, two main contactors are to be used in series.
http://support.automation.siemens.com/WW/view/en/67191091

Brake control:

Control logic has been implemented in the software to control the mechanical motor brake.
See Sheet 2750 in Section 2 of the List Manual
and Section 10.16 of the Operating Instructions

Automatic restart:

If supply faults occur (F60004, F60005, F60006, F60007, F60008, F60009), automatic restart
is possible on return of the power supply for 1U1/1V1/1W1, 3U1/3W1, 5U1,5W1 within the
time parameterized in p50086. This is possible provided that the ON signal for the
SINAMICS DCM is maintained for this duration.
P50086 can be set from 0.00 (automatic restart switched off) to 10.00 seconds, however in
the case of electronic power supply failure (5U1, 5W1, 5N1) a maximum possible failure time
of 2.00 seconds is permitted – if required. The electronics supply can therefore be provided
by a UPS for restart times > 2.00 sec.
10