Pid Control Selection; Process Pid Control - Toshiba TOSVERT VF-AS3 Instruction Manual

2

PID control selection

Select one from the four types of PID control function for your application.
2. 1

Process PID control

Process PID control is selected for temperature or pressure control of fan and pump which is performed gently in
response to change the speed.
[F359: PID control1]
■ Diagram
PID set value
upper-limit
[F367]
Set value
[F389]
PID set value
lower-limit
[F368]
Delay filter
Feedback
[F361]
value
[F360]
Normally, set
"Without filter"
■ Parameter setting
Refer to chapter 4 and 5 for detail of parameter setting.
1) Select the input of set value and feedback value.
It is necessary to convert temperature or pressure into frequency for setting.
Item
Set value
Feedback value
Frequency free unit conversion function enables to set the set value and the feedback value
easily. Refer to chapter 3 for detail.
VF-AS3
= "1: Process PID control" (Plus characteristic)
= "11: Minus Process PID control"
PID deviation
upper-limit
[F364]
PID
control
-
PID deviation
lower-limit
[F365]
PID plus/minus
[F359]
Title
F389 PID1 set value select
FPId PID1 set value
(Only [F389]="12")
F360 PID1 feedback input select
PID output
Output frequency
upper-limit
[F370]
Jump
frequency
Output frequency
PID output
lower-limit
[F371]
Parameter name
2-1
upper-limit
Increase/
[ UL ]
decrease rate
[ACC], [dEC]
lower-limit
[ LL ]
Output
frequency
2. PID control selection
I
II
III
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