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6.2 PID Control Instruction (Exact Differential)
6.2.1 PIDINIT instruction
6-19
PIDINIT
6
PID CONTROL
INSTRUCTION
PIDINIT
m=(n-1) 10+2
n: number of loops
Device Data item Description
Setting range
Setting
side
Processing when the
setting data are outside the
setting range
With PID limits
Without PID
limits
Setting data for No. 2 loop (device: +12 to +21)
+12
Operational
expression
selection
The same as Setting data for No. 1 loop
+13
Sampling cycle
(T
S)
+14
Proportional
constant
(K
P)
+15
Integral
constant
(T
I)
+16
Derivative
constant
(T
D)
+17
Filter coefficient
( )
+18
MV lower limit
(MVLL)
+19
MV upper limit
(MVHL)
+20
MV change rate
limit
( MVL)
+21
PV change rate
limit
( PVL)
Setting data for No. n loop
+(m+0)
Operational
expression
selection
The same as Setting data for No. 1 loop
+(m+1)
Sampling cycle
(T
S)
+(m+2)
Proportional
constant
(K
P)
+(m+3)
Integral
constant
(T
I)
+(m+4)
Derivative
constant
(T
D)
+(m+5)
Filter coefficient
( )
+(m+6)
MV lower limit
(MVLL)
+(m+7)
MV upper limit
(MVHL)
+(m+8)
MV change rate
limit
( MVL)
+(m+9)
PV change rate
limit
( PVL)
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s