
Chapter 4 -SETTING-UP AND COMMISSIONING
584S Frequency Inverter
4-23
PID FB CHOICE
This parameter determines the source of the PID feedback. Range: NONE,
SPEED FEEDBACK, MANUAL SETPOINT AUTO SETPOINT or LOCAL
SETPOINT
Default: NONE.
NONE
SPEED FEEDBACK
MANUAL SP
AUTO SP
PID FB
PID FB CHOICE
LOCAL SP
NOTE:-With the
PID FB CHOICE
parameter set to
NONE
, a fixed value of the PID feedback can be
set directly into the
INPUT 2
parameter.
PID OP
This option provides access to two further parameter options,
PID OP
CHOICE
and
PID OP MODE
.
WARNING!
The inverter output frequency can exceed the
MAX SPEED
parameter setting when using the PID output to trim the
ramp output by 5%.
PID OP CHOICE
This parameter determines the application of the PID output. Range: NONE,
RAMP OUT AS TRIM, RAMP IN AS TRIM or RAMP IN AS SP. Default:
NONE.
NONE
RAMP OUT AS TRIM
RAMP IN AS TRIM
RAMP IN AS SP
PID OP CHOICE
PID OP
For closed-loop speed control,
PID OP CHOICE
should be set to RAMP
OUT AS TRIM and
O/P SCALER (TRIM)
should be chosen such that
maximum PID output corresponds to full load motor slip frequency. In this
way, the ramp output can be trimmed by the PID to compensate for motor
speed variations due to load.
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Содержание 584S
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