Siemens SINAMICS G120 CU250S-2 Series - Page 21

Commissioning
4.2 Connecting the inverter to the fieldbus
CU250S-2 Control Units
Compact Operating Instructions, 05/2014, A5E32899990B AB
21
Bit
Meaning
Explanation
5
0 = Stop RFG
The output of the ramp-function generator stops at the actual value.
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.
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"closing lockout" state.
8, 9
Reserved
10
0 = No control via PLC
The inverter ignores the process data from the fieldbus.
1 = Control via PLC
Control via fieldbus, the inverter accepts the process data from the fieldbus.
11
1 = Direction reversal
Invert setpoint in the inverter.
12
Not used
13
1 = MOP up
Increase the setpoint saved in the motorized potentiometer.
14
1 = MOP down
Reduce the setpoint saved in the motorized potentiometer.
15 Reserved Changes over between settings for different operation interfaces (command data
sets).
Status word 1 (ZSW1)
Bit
Meaning
Comments
0
1 = Ready to start
Power supply switched on; electronics initialized; pulses locked.
1 1 = Ready Motor is switched on (ON/OFF1 = 1), no fault is active. With the command "Enable
operation" (STW1.3), the inverter switches on the motor.
2
1 = Operation enabled
Motor follows setpoint. See control word 1, bit 3.
3
1 = Fault active
The inverter has a fault. Acknowledge fault using STW1.7.
4
1 = OFF2 inactive
Coast down to standstill is not active.
5
1 = OFF3 inactive
Quick stop is not active.
6
1 = Closing lockout active
It is only possible to switch on the motor after an OFF1 followed by ON.
7
1 = Alarm active
Motor remains switched on; no acknowledgement is necessary.
8 1 = Speed deviation within the
tolerance range
Setpoint / actual value deviation within the tolerance range.
9
1 = Master control requested
The automation system is requested to accept the inverter control.
10 1 = Comparison speed reached
or exceeded
Speed is greater than or equal to the corresponding maximum speed.
11
1 = torque limit reached
Comparison value for current or torque has been reached or exceeded.
12
1 = Holding brake open
Signal to open and close a motor holding brake.
13 0 = Alarm, motor
overtemperature
--
14
1 = Motor rotates clockwise
Internal inverter actual value > 0
0 = Motor rotates
counterclockwise
Internal inverter actual value < 0
15 0 = Alarm, inverter thermal
overload