3-Wire Control (P0727 = 2) - Siemens SINAMICS G120 Operating Instructions Manual

Function
With ON_FWD closed and maintained closed the drive is ON and runs in forward direction.
Applying only ON_REV (and keeping the contact closed) the drive is ON and runs in reverse
direction.
If both signals are however enabled (contacts are closed) the drive will perform an OFF1 and
ramp down to a stop.
If both signals are disabled the drive is in OFF1 state.
Figure 8-30
8.9.3

3-wire control (P0727 = 2)

Description
This method uses three commands to control the operation of the motor:
1. STOP: Causes on OFF1 command to be performed by the inverter.
2. FWDP: Causes the motor to run in a forward direction (run right).
3. REVP: Causes the motor to run in the reverse direction (run left).
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
2-wire control using ON_FWD and ON_REV
Functions
8.9 2-/3-wire control
8-45