Siemens SINAMICS G110

Using the SINAMICS G110 04/2005
SINAMICS G110 Operating Instructions
60 6SL3298-0AA11-0BP0
4.3.4 3-wire Control (P0727=3)
Overview
There are three signals associated with this function:
1. OFF1/HOLD – Being maintained closed the opening of the contact will switch
the drive OFF and cause a ramp down to 0 Hz.
2. ON_PULSE – this will run the motor in a forward direction (run right).
3. REV – this will change the direction of the motor to reverse (run left).
Function
The following description refers to Figure 4-5.
The switch OFF1/HOLD uses negative logic: the contact will need to be maintained
closed in order to switch the drive ON or keep it running.
A momentary closure (positive edge) of the ON_PULSE switch latches and starts
the drive if it was OFF before.
The direction can be determined and changed any time using the REV signal.
Opening or closing the ON_PULSE switch while the drive runs has no effect.
Only enabling (i.e. Opening) OFF1/HOLD will unlatch the run-state and then stop
the drive.
Equivalent Control Inputs
Time
Control
Commands
OFF1/HOLD
REV
o = OFF1
ON_PULSE
o
Command
Ignored
OFF1/HOLD
REV
ON_PULSE
OFF1/HOLD
REV
ON_PULSE
Active
Active
Active
ActiveActive
o
Inverter
Frequency
f out
Figure 4-5 3-wire control using ON_PULSE, OFF1/HOLD and REV