Siemens CU240B-2 - Page 214

Advanced commissioning
6.2 Inverter control
Converter with the CU240B-2 and CU240E-2 Control Units
214 Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
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 com-
mand).
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 com-
mand).
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 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
follows the setpoint.
6 0 = Inhibit setpoint The inverter brakes the motor with the ramp-
down time p1121 of the ramp-function gen-
erator.
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 pro-
cess 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
potentiometer.
p1035[0] =
r2090.13
14 1 = MOP down Reduce the setpoint saved in the motorized
potentiometer.
p1036[0] =
r2090.14
15
Reserved