SHENZHEN ENCOM ELECTRIC TECHNOLOGIES CO. enc eds800-2s0002n User Manual page 76

F3.08 Proportion gain Kp
F3.09 Integral gain Ki
F3.10 Differential gain Kd
F3.11 Sampling cycle T
The more big Kp proportion gain is, the more quick the response is， but overbig
is prone to bringing surge.
Only applying proportion gain Kp adjustment can't eliminate offset
completely，can apply integral gain Ki and differential gain to make up of PID
control in order to eliminate residual offset. The bigger Ki is, the more quickly the
system responds to changing offset, but overbig is prone to bringing surge.
Sampling cycle T is sampling cycle for feedback value，during each sampling
cycle PID adjustor calculate for one time，the longer the sampling cycle is , the
slower the system responds.
F3.12 Offset limit
For Max. offset of closed-loop specified value，as shown in Fig.6-17，PID
adjustor stops adjusting when feedback value is within this range. To utilize this
function reasonably redound to harmonizing the conflict between system output
precision and stabilization.
Feedback value
Specified
value
Output
Freq.
Fig.6-17 offset limit
F3.13 integral separation PID adjusting threshold Range：0.0－100.0%
PID integral separation，integral don't react when specified value and feedback
value are bigger than this limit, only when specified value and feedback value are
smaller than or equal to this limit，integral react. Can adjust system response speed
by adjusting this parameter.
EDS800 series Service Manual
Range：0.000－9.999
Range：0.000－9.999
Range：0.000－9.999
Range：0.01－1.00S
Range：0.0－20.0(％)
offset
limit
time
time
preset freq. holding time
Fig.6-18 closed-loop preset freq. run
71
Output Freq.
preset freq.
0.150
0.150
0.000
0.10S
2(％)
time
100.0%