Chapter 4 Explanation of Functions
4 - 59
4.2.54 Control gain switching function (CAS)
The control gain switching function allows you to set and switch
between two types of gains and time constants for the speed
control system (with proportional and integral compensations)
when the V/F characteristic curve selection is the sensorless
vector control.
To use this function, assign function "26" (CAS: control gain
setting) to one of the terminal [1] to [8] functions (C001 to C008).
When the CAS terminal is turned off, the gain settings "H050", "H250", "H051", "H251", "H052", and
"H252" are selected. When the CAS terminal is turned on, the gain settings "H070", "H071", and "H072"
are selected.
If function "26" (CAS: control gain setting) is not assigned to any intelligent input terminal, the same gain
settings as those selected when the CAS terminal is off are selected.
Item Function code Data or ran
e of data Description
V/F characteristic curve selection A044/A244 03 Sensorless vector control
Terminal function C001 to C008 26 CAS: Control
Motor speed constant, 1st/2nd
motors
H005/H205
0.001 to 9.999, 10.00
to 80.00
PI proportional
ain H050/H250 0.0 to 999.9, 1000
ain H051/H251 0.0 to 999.9, 1000
P proportional gain H052/H252 0.01 to 10.00
Terminal selection PI proportional
H070 0.0 to 999.9, 1000 (%)
Terminal selection PI integral gain
settin
H071 0.0 to 999.9, 1000 (%)
Terminal selection P proportional
H072 0.00 to 10.00
Gain switchin
A044/A244: V/F characteristic curve selection, 1st/2nd
motors
C001 to C008: Terminal [1] to [8] functions
H005/H205: Motor speed constant, 1st/2nd motors
H050/H250: PI proportional gain, 1st/2nd motors
H051/H251: PI integral gain, 1st/2nd motors
H052/H252: P proportional gain setting, 1st/2nd motors
H070: Terminal selection PI proportional gain setting
H071: Terminal selection PI integral gain setting
H072: Terminal selection P proportional gain setting
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