Inovance MD380 Series, User Manual

Page: 212 / 304

Description of Function Codes
MD380 User Manual
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Function Code Parameter Name Setting Range Default
FA-15 Proportional gain Kp2 0.0–100.0 20.0
FA-16 Integral time Ti2 0.01–10.00s 2.00s
FA-17 Differential time Td2 0.000–10.000s 0.000s
FA-18
PID parameter switchover
condition
0: No switchover
1: Switchover via DI
2: Automatic switchover
based on deviation
3: Automatic switchover
based on running
frequency
0
FA-19
PID parameter switchover
deviation 1
0.0% to FA-20 20.0%
FA-20
PID parameter switchover
deviation 2
FA-19 to 100.0% 80.0%
In some applications, PID parameters switchover is required when one group of PID
parameters cannot satisfy the requirement of the whole running process.
These parameters are used for switchover between two groups of PID parameters.
Regulator parameters FA-15 to FA-17 are set in the same way as FA-05 to FA-07.
The switchover can be implemented either via a DI terminal or automatically implemented
based on the deviation.
If you select switchover via a DI terminal, the DI must be allocated with function 43 "PID
SDUDPHWHUVZLWFKRYHU,IWKH',LV2))JURXS)$WR)$LVVHOHFWHG,IWKH',LV
21JURXS)$WR)$LVVHOHFWHG
If you select automatic switchover, when the absolute value of the deviation between PID
IHHGEDFNDQG3,'VHWWLQJLVVPDOOHUWKDQWKHYDOXHRI)$JURXSLVVHOHFWHG:KHQWKH
absolute value of the deviation between PID feedback and PID setting is higher than the
YDOXHRI)$JURXSLVVHOHFWHG:KHQWKHGHYLDWLRQLVEHWZHHQ)$DQG)$WKH
PID parameters are the linear interpolated value of the two groups of parameter values.
Figure 6-29 PID parameters switchover
PID deviation
PI
parameters
Group 1 of PID
parameters
FA-19 FA-20
FA-05, FA-06, FA-07
FA-15, FA-16, FA-17
Group 2 of PID
parameters
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