Figure 1.11.2.1: Power Loss Control Function - GE AV-300i User Manual

In a configuration with a multiple drive/motor, where a coordinated stop is usually required, the master Drive must
have, together with the Enable Mst and Enable Slv programming, an analog output set as PL next factor.
The PL next factor signal sets the ratio between the line speed and the present speed.
It must be connected to the Speed ratio. When the power loss is detected, the master speed decreases accord-
ing to the ratio calculated between Speed ref and Motor speed.
Such ratio states the reference for the slave, in order to decrease the speed in a linear way according to the speed
of the master Drive. The motor functioning at a speed controlled by the master can be monitored on a digital
output of the master drive programmed as PL next active.
With a configuration for a multiple motor, such function can be performed only with the Drives connected on
common DC buses.
Ch.1
122
PLS active
PLS P gain
0.349347 A/V
PLS I gain
PLS Vdc ref PI regulator
736,307 V
DC link voltage
PLS mains st src
NULL
PL function sel
Off
PLR P gain
PLR I gain
PI regulator
DC link voltage
Speed ref
Speed ratio
calculator
Norm Speed

Figure 1.11.2.1: Power Loss Control Function

—————— Function Description ——————
GEH-6641E
Power Loss Stop
23.28984 A/V/s
Current Limit
Power Ride Thru
0.235225 A/V
15.6817 A/V/s
Current Limit
PL next active
To Analog input set
as "Speed ratio" of
PL next factor
Next Drive