Siemens SINAMICS G120X - Control Word 1 (STW1)

Function description
Control word 1 (STW1)
Bit Significance Explanation Signal inter‐
connection
in the con‐
verter
Telegram 20 All other tele‐
grams
0 0 = OFF1 The motor brakes with the ramp-down time
p1121 of the ramp-function generator. The con‐
verter switches off the motor at standstill.
p0840[0] =
r2090.0
0 → 1 = ON The converter goes into the "ready" state. If, in
addition bit 3 = 1, then the converter switches
on the motor.
1 0 = OFF2 Switch off the motor immediately, the motor
then coasts down to a standstill.
p0844[0] =
r2090.1
1 = No OFF2 The motor can be switched on (ON command).
2 0 = Quick stop (OFF3) Quick stop: The motor brakes to a standstill
with the OFF3 ramp-down time p1135.
p0848[0] =
r2090.2
1 = No quick stop (OFF3) The motor can be switched on (ON command).
3 0 = Inhibit operation Immediately switch-off motor (cancel pulses). p0852[0] =
r2090.3
1 = Enable operation Switch-on motor (pulses can be enabled).
4 0 = Disable RFG The converter immediately sets its ramp-func‐
tion generator output to 0.
p1140[0] =
r2090.4
1 = Do not disable RFG The ramp-function generator can be enabled.
5 0 = Stop RFG The output of the ramp-function generator
stops at the actual value.
p1141[0] =
r2090.5
1 = Enable RFG The output of the ramp-function generator fol‐
lows the setpoint.
6 0 = Inhibit setpoint The converter brakes the motor with the ramp-
down time p1121 of the ramp-function genera‐
tor.
p1142[0] =
r2090.6
1 = Enable setpoint Motor accelerates to the setpoint with the ramp-
up time p1120.
7 0 → 1 = Acknowledge faults Acknowledge fault. If the ON command is still
active, the converter switches to the "switching
on inhibited" state.
p2103[0] =
r2090.7
8, 9 Reserved
10 0 = No control via PLC Converter ignores the process data from the
fieldbus.
p0854[0] =
r2090.10
1 = Control via PLC Control via fieldbus, converter accepts the proc‐
ess data from the fieldbus.
11 1 = Direction reversal Invert setpoint in the converter. p1113[0] =
r2090.11
12 Not used
13 ---
1)
1 = MOP up Increase the setpoint saved in the motorized
potentiometer.
p1035[0] =
r2090.13
Advanced commissioning
6.3 Drive control
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC 209