Siemens SINAMICS G110, Operating Instructions Manual

Page: 56 / 92

Using the SINAMICS G110 04/2005
SINAMICS G110 Operating Instructions
56
6SL3298-0AA11-0BP0
4.3.1 Siemens standard Control (P0727=0)
When P0727 = 0 there are two possibilities of control available using the following
signals
1. ON/OFF1 and REV.
2. ON/OFF1 and ON REV/OFF1.
4.3.1.1 ON/OFF1 and REV
Overview
This method allows the inverter to be started and stopped using the ON/OFF1
command and the direction of the inverter changed using the REV command.
These commands can be assigned to any of the digital inputs through parameters
P0701 to P0704.
The REV commands can be given at any time, independent of the frequency
output of the inverter.
Function
The following description refers to Figure 4-1.
On receiving an ON/OFF1 command the inverter will run the motor in a forward
direction and ramp-up the motor to the frequency setpoint.
When a REV command is issued, the inverter will ramp-down the frequency
through 0 Hz and run the motor in the reverse direction. When the REV command
is removed the inverter will ramp-up through 0 Hz and run in a forward direction
until the frequency setpoint is reach.
When the ON/OFF1 command is removed, the inverter will stop the motor by
performing an OFF1.
The REV command initiated by itself cannot start the motor.
Equivalent Control Inputs
Time
Inverter
Control
Commands
Active
Active
Active
ON/OFF1
REV
ON/OFF1
REV
ON/OFF1
REV
o
o = OFF1
Frequency
f out
Figure 4-1 Siemens standard control using ON/OFF1 and REV