Siemens SIMOCODE pro System Manual page 226

Motor control
Change-over pause
SIMOCODE pro prevents the contactors for "FAST" and "SLOW" from being
switched on simultaneously. The "Change-over pause" can be used to delay
switching from "FAST" to "SLOW" to give the motor enough time to run
down.
Safety guidelines
Note
At least one additional digital module is required for this control function.
Notice
Two set currents must be set for this control function:
• I 1 for the slow speed
s
• I 2 for the fast speed.
s
Depending on the current range, the current can in many cases be directly
measured at both speeds with a single current converter. Otherwise you
will need two external current converters according to the corresponding
speed (e.g. 3UF18 with a 1 A secondary transformer rated current), whose
secondary cables must lead through the current measuring module with the
range 0.3 - 3 A. The set current I
the secondary currents of the external transformers. For further information,
see Chapter 3.2 "Overload
4-48
1 or I 2 must be converted according to
s s
protection".
SIMOCODE pro
GWA 4NEB 631 6050-22 DS 03