Siemens ECOFAST, Manual

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Device functions
ECOFAST Motor Starters
GWA 4NEB 950 0562-12
5-3
Deutsc
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Eng
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5.2 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.
Note
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 DO-0.0 [1]: ON
[0]: OFF
• Motor CCW DO-0.1 [1]: ON
[0]: OFF
The reversing starter control function returns the following signal to
input DI-0.1:
• Motor on DI-0.1 [1]: YES
[0]: NO