Efficient Networks S120 manual Prerequisites, Vector control 4.20 Bypass

Vector control 4.20 Bypass

Description

Redundant operation can be used so that operation can be continued in spite of the failure of one power unit connected in parallel. In order that the failed power unit can be replaced, DRIVE-CLiQ cables must be connected in a star-type configuration - it may be necessary to use a DRIVE-CLiQ HUB Module (DMC20). The failed power unit must be deactivated via p0125 or via the binector input p0895, before it is removed. When a replacement power unit has been installed it must be activated accordingly.

Prerequisites

●Parallel connection only works with equivalent (order number) chassis power units.

●Maximum number of parallel power units is 4

●Minimum firmware release 2.4

●Parallel connection of power units with suitable power reserves

●DRIVE-CLiQ star topology (possibly a DMC20, refer to the Equipment Manual)

●Motor with one single-winding system (p7003 = 0)

●No safe standstill

Integration

The boot function with partial topologies is integrated in the system as follows.

●p0125 Activate/de-activate power unit component

●r0126 Power unit component active/inactive

●p0895 BI: Activate/deactivate power unit component

●p7003 Par_circuit winding system

4.20Bypass

Features

●Available for the vector mode

●Available for induction motors without encoder

Description

The bypass function controls two contactors via digital outputs of the drive converter and evaluates the feedback signals of the contactors via digital inputs (e.g. via TM31). This circuit allows the motor to either be fed from the drive converter or connected directly to the supply line. The drive converter controls the contactors; the feedback signals for the contactor states must be fed back to the drive converter.

This bypass circuit can be implemented in two ways:

● Without synchronizing the motor to the line supply and

Drive Functions	159
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4