Megmeet SPS-NE Series - Page 38

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The dynamic braking usage ratio P08.21 and braking startup voltage P08.22 are only applicable to the servo drive
with an internal braking unit. Adjusting P08.22 properly can achieve quick stop by dynamic braking.
Loop gain adjustment
Function
code
Name
Value range
Default value
Change
P12.05
Current loop
proportional gain
1 to 5000
600
○
P12.06
Current loop integral
time
0.5 to 100.0 ms
8.0
○
P05.00
Speed loop low-speed
proportional gain
0.1 to 200.0
20.0
○
P05.01
Speed loop low-speed
integral time
0.000 to 10.000
0.200 s
○
P05.03
Switchover frequency 1
0.0% to 50.0%
10.0%
○
P05.04
Speed loop high-speed
proportional gain
0.1 to 200.0
20.0
○
P05.05
Speed loop high-speed
integral time
0.000 to 10.000
0.200 s
○
P05.07
Switchover frequency 2
0.0% to 100.0%
20.0%
○
Improper PID setting will make the system unstable.
In speed control, the current loop and the speed loop should be adjusted. The current loop is the inner loop, and the
speed loop is the outer loop. Generally, adjust the current loop first, then adjust the speed loop. The speed loop
consists of multi-stage PI, and the switchover frequency can be adjusted according to actual needs. See the
following figure: