Siemens SINAMICS G120 - Page 235

Control word 1 (STW1)
Bit Meaning Explanation Signal inter‐
connection in
the inverter
0 0 = OFF1 The motor brakes with the ramp-down time p1121 of
the ramp-function generator. The inverter switches off
the motor at standstill.
p0840[0] =
r2090.0
0 → 1 = ON The inverter goes into the "ready" state. If, in addition
bit 3 = 1, then the inverter 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 with the OFF3 ramp-
down time p1135 down to standstill.
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 inverter immediately sets its ramp-function gener‐
ator 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 follows the
setpoint.
6 0 = Inhibit setpoint The inverter brakes the motor with the ramp-down time
p1121 of the ramp-function generator.
p1142[0] =
r2090.6
1 = Enable setpoint Motor accelerates with the ramp-up time p1120 to the
setpoint.
7 0 → 1 = Acknowledge
faults
Acknowledge fault. If the ON command is still active,
the inverter switches to the "switch-on inhibit" state.
p2103[0] =
r2090.7
8, 9 Reserved
10 0 = No control via PLC Inverter ignores the process data from the fieldbus. p0854[0] =
r2090.10
1 = Control via PLC Control via fieldbus, inverter accepts the process data
from the fieldbus.
11 1 = Direction reversal Invert setpoint in the inverter. p1113[0] =
r2090.11
12 Reserved
13 1 = MOP up Increase the setpoint saved in the motorized potenti‐
ometer.
p1035[0] =
r2090.13
14 1 = MOP down Reduce the setpoint saved in the motorized potenti‐
ometer.
p1036[0] =
r2090.14
15 Reserved
Advanced commissioning
6.6 Drive control via USS
Converter with the CU230P-2 Control Units
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257946B AE 235