Siemens SINAMICS DCM Manual page 511

Descriptions of functions
10.9 Switch on, switch off, enable
10.9 Switch on, switch off, enable
10.9.1 Switch on/Switch off (ON/OFF1) - control word bit 0
The "Switch on/Shutdown" (ON/OFF1) function is controlled using the "ON/OFF1 switch-on
command" (= ANDing the signal from terminal X177.12 with the signal selected using
p0840).
The following operating modes are possible here:
p50445 = 0:
p50445 = 1:
Sequence of events for switching on the drive:
1. Apply the "Switch on" command (e.g. using the "Switch on/Shutdown" terminal).
2. The system exits operating state o7.
3. The "Line contactor closed" relay (terminal XR1-109 and -110) picks up.
4. The field-current reduction function stops.
If "Operation enable" is applied:
5. With positive brake-release time (p50087):
The "Release holding or operational brake" (r53210.0 = 0) signal is output and p50087 is
awaited in operating state o1.0.
With negative brake-release time (p50087 negative):
Procedure goes straight to step 6; brake not yet closed (r53210.0 = 1).
6. The ramp-function generator, n controller, and I controller are enabled.
7. Once a negative brake-release time (p50087) has elapsed, the "Release holding or
operational brake" (r53210.0 = 0) signal is output.
Procedure for shutting down the drive:
1. Apply the "Shutdown" command (e.g. using the "Switch on/Shutdown" terminal).
2. Deceleration along the ramp-function generator ramp
3. Wait until n < nmin (p50370, p50371).
4. The "Close holding or operational brake" (r53210.0 = 1) signal is output.
5. The brake-closing time (p50088) is awaited.
6. The ramp-function generator and n controller are disabled.
7. Reduction in armature current
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The "ON/OFF1 switch-on command" takes the form of ANDing the signal from
terminal X177.12 with the signal selected using p0840 (level-controlled, 0 =
shutdown, 1 = switch on).
Edge triggering of "ON/OFF1 switch-on command":
The switch-on command is saved when a 0 → 1 transition takes place (see
function diagram 3130 in the SINAMICS DCM List Manual). The binector se-
lected using p50444 must be in the log. "1" state at this point. The memory is
reset when this binector enters the log. "0" state.
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SINAMICS DCM DC Converter
Operating Instructions, 02.2015, A5E34763375/RS-AA/001