PG feedback parameter group 09
PARAMETER DESCRIPTION 197
5.9.9 PID parameter switchover
If one group of PID parameters cannot meet the requirements of the whole process control, two groups of PID can
effectively solve the problem.
PID parameter
switchover operation
selection
Switch PID according to deviation
PID parameter
switchover deviation
lower limit
If deviation is less than 08-34 (P.721), the first group of PID
parameters will work.
If deviation is greater than 08-35 (P.722), the second group
of PID parameters will work.
If deviation is between the above two, PID parameters will
change linearly.
PID parameter
switchover deviation
upper limit
PID parameter switchover
In some applications, a group of PID parameters cannot meet the requirements of the whole operation process, so
different PID parameters need to be adopted in different situations. Two groups of PID parameters can be
automatically switched according to the PID deviation, as shown in the following diagram:
PID deviation
absolute value
PID parameters
08-34
(P.721)
08-35
(P.722)
Group 1 of PID parameters
08-25(P.712)08-26(P.713)
08-27(P.714)
Group 2 of PID parameters
08-20(P.641)08-21(P.642)
08-22(P.643)
5.9.10 PID action when error occurs
When PID encounter sensor disconnect or inverter stop, 08-39(P.726) and 08-40(P.727) will show different action
to apply to different applications.
PID disconnection
operation option
0: Select no need to run to the upper limit when PID is
disconnected
1: Select need to run to the upper limit when PID is
disconnected
PID counting when
inverter stop action
selection
PID stop counting when inverter stop
PID stop counting when inverter stop