Figure 4-2 Siemens Standard Control Using On/Off1 And On_Rev/Off1 - Siemens SINAMICS G110 Operating Instructions Manual

04/2005
4.3.1.2 ON/OFF1 and ON_REV/OFF1
Overview
This method allows the inverter to run the motor in a forward direction (run right)
using the ON/OFF1 command and in the opposite direction (run left) using the
ON_REV/OFF1.
However, for a direction reversal the drive will first have to decelerate with OFF1
and when reaching 0 Hz the reverse signal can be applied.
Function
The following description refers to Figure 4-2.
The ramp down phase can be interrupted by start command in the same direction:
if the drive was operating in forward and OFF1 was applied, an ON/OFF1 will work
correctly and accelerate again the drive up to the setpoint speed. The same is valid
for reverse and ON REV/OFF1
Giving a start command for the opposite direction of which the inverter frequency
output is ramping down, the drive ignores the new setting and the drive will ramp
down to 0 Hz and then remain at standstill.
Without any control signal enabled the drive will ramp down to a stop and remain at
standstill.
Control
Commands
Inverter
Frequency
Figure 4-2
SINAMICS G110 Operating Instructions
6SL3298-0AA11-0BP0
ON/OFF1
ON_REV/OFF1
Act.
ON/OFF1
ON_REV/OFF1
o
f out
Siemens standard control using ON/OFF1 and ON_REV/OFF1
ON/OFF1
ON_REV/OFF1
Equivalent Control Inputs
Active
Ignored
o
Using the SINAMICS G110
Ignored
Active
o
Time
o = OFF1
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