Reversing Starter" Control Function - Siemens SIMOCODE pro System Manual

Motor control
4.2.5

"Reversing starter" control function

Description
With this control function, SIMOCODE pro can control the direction of
rotation of the motor (forwards and backwards).
Control commands
• Start with "ON >" activates the QE1 contactor control (clockwise, i.e.
forwards)
• Start with "ON <" activates the QE2 contactor control (counter-clockwise, i.e.
backwards)
• Stop with "OFF" deactivates the QE1 and QE2 internal contactor controls.
The control commands can be issued to SIMOCODE pro from arbitrary
control stations (see also the description of "control stations"). Thus, the
inputs (plugs) must be connected to the corresponding sockets, preferably
to the "Enabled control command" sockets.
Every fault message causes the QE1 and QE2 contactor controls to be
deactivated.
Switching the direction of rotation
It is possible to switch the direction of rotation if the signal
"Status - ON >" or "Status - ON <" has expired (motor switched off) AND
after the interlocking time has elapsed:
• Via the OFF control command.
• Directly, when the "Saving change-over command" is activated.
SIMOCODE pro prevents both contactors from switching on at the same
time. Switching from one direction of rotation to the other can be delayed
via the interlocking time.
4-24
SIMOCODE pro
GWA 4NEB 631 6050-22 DS 03