
6-40
Programming Your Application
590+ Series DC Digital Converter
INERTIA COMP
This function block directly compensates
for load inertia during acceleration.
This is particularly useful in high accuracy
applications such as positioning systems and
elevators.
The block calculates its output at the same
rate as the current loop for maximum performance.
Functional Description
to Speed Loop
INERTIA
d
SPEED DEMAND
dt
DELTA
FILTER
UNSCALED OUTPUT
INERTIA COMP OUTPUT
RATE CAL
Inertia Comp
INERTIA COMP OUTPUT
[602]
–
0.00 %
UNSCALED OUTPUT
[603]
–
0.00 %
DELTA
[601]
–
0.00 %
0.00
–
[556] INERTIA
0
–
[557] FILTER
100.00
–
[558] RATE CAL
MMI Menu Map
1
SETUP PARAMETERS
2
SPEED LOOP
3
ADVANCED
4
INERTIA COMP
INERTIA
FILTER
RATE CAL
DELTA
UNSCALED OUTPUT
INERTIA COMP O/P
Parameter
Tag
Range
INERTIA COMP OUTPUT
602
x.xx %
Inertia compensation directly added to the speed loop output.
UNSCALED OUTPUT
603
x.xx %
Unscaled inertia compensation.
DELTA
601
x.xx %
Rate of change of speed demand in %/s
2
.
INERTIA
556
0.00 to 200.00 %
The value of current necessary to accelerate load to 100% speed in 1 second.
FILTER
557
0 to 20000
Low pass filter acting on the DELTA parameter.
RATE CAL
558
0.00 to 200.00
Inertia compensation scaling factor.