158
Bidirectional Reference Control
PID Control Selection (n128)
≠
0 (Enabled) and Bi-directional PID Pro-
hibit Input from a Multi-function Input = ON (Bi-directional Range
Function Enabled):
If the frequency reference is from 0% to 50% after PID control, the
input rotation direction command will be reversed. If the reference is
from 50% to 100%, operation will be performed without reversing the
input rotation direction command.
The frequency reference at this time is shown in the following diagram.
(The diagram shows operation when a Forward Run Command is
input.) (If Reverse Run Prohibit (n006) is set to 1, however, reverse
operation will not be performed and the frequency reference will be lim-
ited to 0 Hz.)
Bi-directional Function Operation Table
PID Control Selection
(n128)
Bi-directional PID Prohibit Input
(S1 to S7)
OFF
ON
K
0
(PID control enabled)
PID output is used
bi-directional
Frequency reference
is used bi-directional
0
(PID control disabled)
Frequency reference
is used bi-directional
Frequency reference
is used bi-directional
0
50
100
Frequency reference
Maximum Output Frequency (n011)
Reverse
Forward
Frequency (%) after PID control
100%/Maximum Output Frequency (n011)
