Operating Instructions

Siemens Application Siemens Industry, Inc. • 91
24-hour support [phone] (Dial 2)
3
EXAMPLE OF THE INTERLOCK LOGIC:
If the motor starting order is
1->2->3->4->5
When the interlock of motor 3 is removed, i.e. the value of parameter P3.5.1.27 is set to FALSE, the order
changes to:
1->2->4->5.
If motor 3 is taken into use again (changing the value of parameter P3.5.1.27 to TRUE), the system runs
without stopping and motor 3 is placed last in the sequence:
1->2->4->5->3
The next time the system is stopped or goes to sleep mode, the sequence returns to its original order.
1->2->3->4->5
Include FC (P3.14.3)
WIRING
There are two different ways to make the connections depending on whether selection 0 or 1 is set as
parameter value.
Selection 0, Disabled:
The variable frequency drive or the regulating motor is not included in the auto-change or interlocks logic.
The drive is directly connected to motor 1 as in Figure 36 below. The other motors are auxiliary ones
connected to the mains by contactors and controlled by relays in the drive.
Selection Selection name Description
0 Disabled
Motor 1 (motor connected to variable frequency drive) is
always frequency controlled and not affected by interlocks.
1 Enabled All motors can be controlled and are affected by interlocks.