Powtran PI500-S 022G3 - Page 48

Chapter 5 Function parameter
44
Chapter 5
E2.10 is used for filtering the PID output frequency, the filter will weaken the sudden change
of the inverter output frequency, but it will also bring the response performance of the process
closed loop system.
E2.11
PID feedback loss detection value
0.0%: not judged feedback loss
0.1% to 100.0%
0.0%
☆
E2.12
PID feedback loss detection time
0.0s to 20.0s
0.0s
☆
This function code is used to determine whether the PID feedback is lost or not.
When the PID feedback is less than the PID feedback loss detection value(E2.11), and the
duration is longer than the PID feedback loss detection time(E2.12), the inverter will alarm fault ID
Err.31, and troubleshoot according to the selected method.
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
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~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