Siemens SINAMICS DCM Manual page 516

10.10 Safety shutdown (E-STOP)
Note
The E-STOP function is not an EMERGENCY STOP function in the sense of EN 60204-1.
The E-STOP function forces the "line contactor closed" relay to drop out, activating the relay
contact (terminals XR1-109 and -110) for the main contactor control within approximately 15
ms, independent of the semiconductor components and Control Unit (CUD) functions. If the
CUD is operating correctly, applying I = 0 via the controller serves to disconnect the line
contactor from the power supply. The drive coasts down once E-STOP has been applied.
The E-STOP function is triggered when the switch between terminals XS1-105 and XS1-106
is opened.
The E-STOP function causes the drive to enter the "Switching on inhibited" operating state.
This must be acknowledged by activating the "Shutdown" function by opening terminal
X177.12, for example.
Procedure for applying E-STOP:
1. The ramp-function generator, n controller, and I controller are disabled.
2. Reduction in armature current
3. a) p51616 = 0: E-STOP acts like OFF2 (firing pulses are disabled as soon as I = 0).
b) p51616 = 1: E-STOP immediately stops firing pulses from being output (without waiting
for I = 0).
4. The "Close operational brake" signal is output (r53210.0 = 1, where p50080 = 2).
5. Operating state o10.0 or higher is reached.
6. The field current is maintained at a fixed point (i.e. there is no increase in the field current,
even on exiting the field-weakening range).
7. The "Line contactor closed" relay (terminal XR1-109 and XR1-110) drops out.
8. The drive coasts down (or is decelerated by the operational brake).
9. The wait time (to be set at p50258) elapses.
10.The field is reduced to a parameterizable value (p50257).
11.Once n < nmin (p50370, p50371), the "Close holding brake" signal is output (r53210.0 =
1, where p50080 = 1).
Note
15 ms after E-STOP has been applied (even if point 7 in this procedure has not yet been
reached), the "Line contactor closed" relay (terminal XR1-109 and XR1-110) will always drop
out; this is triggered by the hardware.
SINAMICS DCM DC Converter
Operating Instructions, 02.2015, A5E34763375/RS-AA/001
ac.maher.co.ir
Descriptions of functions
10.10 Safety shutdown (E-STOP)
517