Chapter 5 Function parameter
109
Ch
ap
ter 5
E2.13 Proportional gain KP1
0.0 to 200.0
80.0
☆
E2.14 Integration time Ti1
0.01s to 10.00s
0.50s
☆
E2.15 Differential time Td1
0.00s to 10.000s
0.000s
☆
Proportional gain KP1:Used to decide the extent of the PID regulator, the greater KP1, the
greater adjusting extent. This parameter 100.0 means that when the deviation of PID feedback
value and reference value is 100.0%, the PID regulator will adjust the output frequency command
to the maximum frequency.
Integration time Ti1: used to decide the extent of integral adjustment of the PID regulator. The
shorter integration time, the greater extent of integral adjustment The integration time means that
when the deviation of PID feedback value and reference value is 100.0%, the integration regulator
will successively adjust to the maximum frequency for the time.
Differential time Td1: used to decide the extent that the PID regulator adjusts the deviation
change rate. The longer differential time, the greater extent of adjustment The differential time
means that the feedback value changes 100.0% within the time, the differential regulator will
adjust to the maximum frequency.
E2.16 Proportional gain KP2
0.0 to 200.0
20.0
☆
E2.17 Integration time Ti2
0.01s to 10.00s
2.00s
☆
E2.18 Differential time Td2
0.00s to 10.000s
0.000s
☆
E2.19
PID parameter switching
conditions
PID parameter switching
deviation 1
no switching
0
0
☆
switching via terminals
1
automatically switching according to
deviation.
2
E2.20 Proportional gain KP2
0.0% to E2.21
20.0%
☆
E2.21 Integration time Ti2
E2.20 to 100.0%
80.0%
☆
In some applications, only one group of PID parameters can not meet the needs of the entire
run, it is required to use different PID parameters under different conditions.
This group of function codes is used to switch between two groups of PID parameters. Which
the setting method for regulator parameter(E2.16 to E2.18) is similar to the parameter(E2.13 to
E2.15).The two groups of PID parameters can be switched by the multi-functional digital DI
terminal, can also be switched automatically according to the PID deviation.If you select the multi-
functional DI terminal, the multi-function terminal function selection shall be set to 43 (PID
parameter switching terminal), select parameter group 1 (E2.13 E2.15) when the terminal is
inactive, otherwise select parameter group 2 (E2.16 to E2.18).
If you select the automatic switch mode, and when the absolute value of deviation between
reference and feedback parameters is less than PID parameter switching deviation 1(E2.20), select
parameter group 1 for PID parameter. When the absolute value of deviation between reference and
feedback parameters is more than PID parameter switching deviation 2(E2.21), select parameter
group 2 for PID parameter. If the deviation between reference and feedback parameters is between
switching deviation 1 and switching deviation 2, PID parameter is the linear interpolation of the
two groups of PID parameters , as shown in the figure.
PID parameter 1
E2.13、E2.14、E2.15
PID deviation
PID parameter
E2.20
E2.21
PID parameter 2
E2.16、E2.17、E2.18
Diagram 5-33:
PID parameter switch
