HNC Electric HV590 Series, User Manual

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103
Section V. Parameter Function Table
PA.20
PID parameter switching
deviation2
PA.19~100.0%
80.0%
☆
Fig.5-26PID parameter switching schematic diagram
In some applications, one group of PID parameters can not meet the needs of the whole operation
process. Different parameters are used for different situations.
This group of function codes is used to switch 2 groups of PID parameters. Regulator parameters
PA.15~PA.17 and parameter PA.05~PA.07 have the same setting method.
Two groups of PID parameters can be switched through multi-function digital DI terminal as well as
PID deviation auto switching.
PA.18=1
：
Set multi-function terminal to 43(PID parameter switching terminal). Choose parameter
group 1(PA.05~PA.07) when terminal invalid,while valid please choose parameter group 2(PA.15~PA.17).
PA.18=2
：
When deviation absolute value between reference and feedback is less than PA.19 set
value, PID parameters select parameter group 1. When deviation absolute value between reference and
feedback is greater than PA.20 set value, PID parameters select group 2. When deviation absolute value
between reference and feedback is within the range of switching deviation 1 &2 , PID parameters select
linear interpolation value of the 2 PID parameter groups.As shown in 5-26.
PA.21
PID initial value 0.0%~100.0%
0.0%
☆
PA.22
PID initial value retention time 0.00s~650.00s
0.00s
☆
Inverter fixed startup value is PID initial value(PA.21) .PID starts closed-loop regulation after PID initial
value retention time(PA.22).
Fig.5-27 PID initial function schematic diagram
This function is used to limit difference between the PID output two beat (2ms/ beat ), which
PA.19
PA.20 PID deviation
PI parameter
PID parameter1
PA.05
、
PA.06
、
PA.07
PID parameter2
PA.15
、
PA.16
、
PA.17
Output frequency
Hz
t
PA.21
PA.22