Pole-Changing Starter" Control Function - Siemens SIMOCODE pro Operating Manual

4.2.2.11

"Pole-changing starter" control function

Description
With this control function, SIMOCODE pro can control motors with two stator windings at two
speeds (FAST and SLOW).
Control commands
● SLOW: Start with "ON >" first activates the QE2 contactor control (SLOW).
● FAST: Start with "ON >>" activates QE1 contactor control (FAST)
● Stop with "OFF" deactivates the contactor controls.
The control commands can be issued to SIMOCODE pro from any 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.
It does not matter in what order the control commands are given.
Every fault message causes the contactor control to be deactivated.
Switching the speed
The speed can be switched once the "Feedback ON" signal has expired (motor is switched
off) and on change-over from "FAST"→"SLOW" after the change-over pause has elapsed:
● Via the OFF control command.
● Directly when "Saving change-over command" is activated.
Change-over pause
The "Change-over pause" parameter can be used to delay switching from "FAST"→"SLOW"
to give the motor enough time to run down.
Note
Two current settings must be set for this control function:
• I
• I
Depending on the current range, the current can in many cases be directly measured at both
speeds with a single current transformer. Otherwise you will need two external current
transformers appropriate for the relevant speed (e.g. 3UF18 with a 1 A secondary
transformer rated current), whose secondary cables must lead through the current
measuring module within the range 0.3 to 3 A. The current setting I
converted according to the secondary currents of the external transformers. For more
information, see Chapter Overload protection (Page 34).
SIMOCODE pro - Parameterize
Operating Manual, 04/2017, A5E40507630002A/RS-AA/001
1 for the SLOW speed
s
2 for the FAST speed.
s
Parameters
4.2 Motor control
1 or I 2 must be
s s
97