Inovance MD380 Series, User Manual

Page: 211 / 304

MD380 User Manual Desc
ription of Function Codes
- 211 -
Function Code Parameter Name Setting Range Default
FA-08
Cut-off frequency of PID reverse
rotation
0.00 to maximum frequency 2.00 Hz
In some situations, only when the PID output frequency is a negative value (AC drive
reverse rotation), PID setting and PID feedback can be equal. However, too high reverse
rotation frequency is prohibited in some applications, and FA-08 is used to determine the
reverse rotation frequency upper limit.
Function Code Parameter Name Setting Range Default
FA-09 PID deviation limit 0.0%–100.0% 0.0%
If the deviation between PID feedback and PID setting is smaller than the value of FA-09,
PID control stops. The small deviation between PID feedback and PID setting will make the
output frequency stabilize, effective for some closed-loop control applications.
Function Code Parameter Name Setting Range Default
FA-10 PID differential limit 0.00%–100.00% 0.10%
It is used to set the PID differential output range. In PID control, the differential operation
may easily cause system oscillation. Thus, the PID differential regulation is restricted to a
small range.
Function Code Parameter Name Setting Range Default
FA-11 PID reference change time 0.00–650.00s 0.00s
The PID reference change time indicates the time required for PID reference changing from
0.0% to 100.0%. The PID reference changes linearly according to the change time, reducing
the impact caused by sudden reference change on the system.
Function Code Parameter Name Setting Range Default
FA-12
3,'IHHGEDFN¿OWHUWLPH
0.00–60.00s 0.00s
FA-13
3,'RXWSXW¿OWHUWLPH
0.00–60.00s 0.00s
)$LVXVHGWR¿OWHUWKH3,'IHHGEDFNKHOSLQJWRUHGXFHLQWHUIHUHQFHRQWKHIHHGEDFNEXW
slowing the response of the process closed-loop system.
)$LVXVHGWR¿OWHUWKH3,'RXWSXWIUHTXHQF\KHOSLQJWRZHDNHQVXGGHQFKDQJHRIWKH$&
drive output frequency but slowing the response of the process closed-loop system.
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