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Description of Function Codes
MD380 User Manual
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F unction Code Parameter Name Setting Range Default
F A-25 PID integral property
Unit's digit (Integral separated)
00
0: Invalid
1: Valid
Ten's digit (Whether to stop integral
operation when the output reaches the limit)
0: Continue integral operation
1: Stop integral operation
• Integral separated
If it is set to valid, , the PID integral operation stops when the DI allocated with function
38 "PID integral pause" is ON In this case, only proportional and differential operations
take effect.
If it is set to invalid, integral separated remains invalid no matter whether the DI
allocated with function 38 "PID integral pause" is ON or not.
• Whether to stop integral operation when the output reaches the limit
If "Stop integral operation" is selected, the PID integral operation stops, which may help
to reduce the PID overshoot.
F unction Code Parameter Name Setting Range Default
F A-26
Detection value of PID
feedback loss
0.0%: Not judging feedback loss
0.1%–100.0%
0.0%
F A-27
Detection time of PID
feedback loss
0.0–20.0s 0.0s
These parameters are used to judge whether PID feedback is lost.
If the PID feedback is smaller than the value of FA-26 and the lasting time exceeds the
value of FA-27, the AC drive reports Err31 and acts according to the selected fault protection
action.
F unction Code Parameter Name Setting Range Default
F A-28 PID operation at stop
0: No PID operation at stop
1: PID operation at stop
0
It is used to select whether to continue PID operation in the state of stop. Generally, the PID
operation stops when the AC drive stops.
Group FB : Swing F requency, F ixed Length and Count
The swing frequency function is applied to the textile and chemical fiber fields and the
applications where traversing and winding functions are required.
The swing frequency function indicates that the output frequency of the AC drive swings up
and down with the set frequency as the center. The trace of running frequency at the time
axis is shown in the following figure.