Reversing Starter Control Function - Siemens ecofast 3RK1702-2GB18-0AA1 Manual

6.2

Reversing starter control function

Description
This control function enables the motor starter to control the direction of
rotation of motors. An internal logic circuit prevents both contactors from
being energized at the same time.
Attention
Bear in mind that it is only permissible to switch from one direction of rota-
tion to the other after a certain delay. During this delay, the flywheel of the
drive is supposed to come to a standstill. The length of the delay depends
on which drive is being used, and must be taken into account accordingly in
the application program.
Control outputs
The direction of rotation is controlled with two outputs, DO-0.0 and DO-0.1:
• Motor CW
• Motor CCW
The reversing starter control function returns the following signal to
input DI-0.1:
• Motor on
ECOFAST Motor Starters
GWA 4NEB 950 5221-12 DS 02
DO-0.0 [1]: ON
[0]: OFF
DO-0.1 [1]: ON
[0]: OFF
DI-0.1 [1]: YES
[0]: NO
Device functions
6-3