6 Programming Features
163
PID Feedback Loss Detection (n136, n137, n138)
PID Upper Limit
Sets the upper limit after PID control as a percentage of the maximum
output frequency.
Prohibition of PID Output
Zero limit occurs when the PID output is negative.
Analog Position Control with Bi-directional PID Output(n145)
If the Bi-directional Function Selection (n145) is set to 1 (enabled), the
following functions will be enabled as bi-directional functions:
• PID Control Selection (n128) ≠ 0 (Enabled) and Bi-directional PID
Prohibit Input from Multi-function Input = OFF (Bi-directional PID
Function Enabled):
If the frequency reference is negative after PID control, the input
rotation direction command will be reversed, and the frequency refer-
ence will be converted to an absolute value. (If Reverse Run Prohibit
(n006) is set to 1, however, reverse operation will not be performed
and the frequency reference will be limited to 0 Hz.)
Constant
No.
Name Unit Setting Range Factory
Setting
n136 Selection for PID
Feedback Loss
Detection
- 0: No detection of PID
feedback loss
1: Detection of PID
feedback loss, oper-
ation continued: FbL
alarm
2: Detection of PID
feedback loss, out-
put turned OFF:
Fault
0
n137 PID Feedback
Loss Detection
Level
1 % 0 to 100
100%/Max. output fre-
quency
0
n138 PID Feedback
Loss Detection
Time
0.1 s 0.0 to 25.5 1.0
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