5-60
H28
Droop Control
In a system in which two or more motors drive single machinery, any speed gap between
inverter-driven motors results in some load unbalance between motors. The droop control
allows each inverter to drive the motor with the
its
load, elimina
such kind
oad unbalan
speed droop characteristics for increasing
ce.
ting
of l
To use dro
op control, be sure to auto-tune the inverter for the motor.
H3
y98
0
Communications Link Function (Mode selection)
Bus Link Function (Mode selection)
Using the RS-485 communications link (standard/option) or field bus (option) allows you to
issue frequency commands and run commands from a computer or PLC at a remote location,
as well as monitoring the inverter running information and the function code data.
H30 and y98 specify the sources of those commands--"inverter itself" and "computers or
PLCs via the RS-485 communications link or field bus." H30 is for the RS-485
communications link; y98 for the field bus.
Comman
Co
d sources selectable
mmand sources
Description
Inverter i
y command
urce: Via the keypad or digital input
ts
Frequency command source: Specified by F01/C30, or
multi-frequenc
elf
Sources except RS-485 communications link and field bus
Run command so
terminals selected by F02
Via RS-4
(standard)
85 communications link
Via the standard RJ-45 port used for connecting keypad
Via RS-48
(option card)
s link (option card)
5 communications link
Via RS-485 communication
Via field bus (option)
Via field bus (option) using FA protocol such as DeviceNet or
PROFIBUS-DP
Summary of Contents for FRENIC-Multi series
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