ABB ACS880 Firmware Manual page 427

No. Name / Range /
Selection
0.10 ... 100.00
40.33 Set 1 integration
time
0.0 ... 32767.0 s
40.34 Set 1 derivation time
0.000 ... 10.000 s
Description
Gain for PID controller.
Defines the integration time for the process PID
controller.
This time needs to be set to the same order of
magnitude as the reaction time of the process being
controlled, otherwise instability will result.
Error/Controller output
G x I
G x I
Ti
I = controller input (error)
O = controller output
G = gain
Ti = integration time
Note: Setting this value to 0 disables the "I" part,
turning the PID controller into a PD controller.
Integration time.
Defines the derivation time of the process PID
controller. The derivative component at the controller
output is calculated on basis of two consecutive error
values (E and E ) according to the following formula:
K-1 K
PID DERIV TIME × (E - E
K
T = 2 ms sample time
S
E = Error = Process reference - process feedback.
Derivation time.
O
I
)/ T
, in which
K-1 S
Parameters 427
Def / Type
FbEq 16b / 32b
100 = 1 / 100 = 1
60.0 s / real32
Time
1 = 1 s / 10 = 1 s
0.000 s / real32
1000 = 1 s / 1000 = 1
s