Switch On, Switch Off, Enable; Switch On/Switch Off (On/Off1) - Control Word Bit 0 - Siemens SINAMICS DCM Operating Instructions Manual

10.7

Switch on, switch off, enable

10.7.1

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.
5. With positive brake-release time (p50087):
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
SINAMICS DCM DC Converter
Operating Instructions, 1.2012, C98130-A7066-A1-05-7619
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
selected using p50444 must be in the log. "1" state at this point. The memory
is reset when this binector enters the log. "0" state.
If "Operation enable" is applied:
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).
operational brake" (r53210.0 = 0) signal is output.
Descriptions of functions
10.7 Switch on, switch off, enable
395