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6F3B0250
Basic Hardware and Function
239
7. Instructions
PID algorithm:
DDDD
D
MV K P I D
MV MV MV
nnnn
nn n
P
=× ++
=±
-
()
1
Here,
D
Pee
eSVPV
nnn
nnn
=-
=-
-
1
D
D
I
etIr
T
n
n
I
=
×+
D
D
D
D
D
TPV PV tD Dr
tT
DD D
n
nn n
nn n
D
D
=
×--×+
+×
=+
=
--
-
()
.
11
1
01
h
h
Parameter details
A
Process input value PVC (0.00 to 100.00 %) Data range: 0 to 10000
A+1
Auto mode set value ASV (0.00 to 100.00 %) Data range: 0 to 10000
A+2
Cascade mode set value CSV (0.00 to 100.00 %) Data range: 0 to 10000
A+3
Manual mode MV MMV (-25.00 to 125.00 %) Data range: -2500 to 12500
A+4
MV tracking input TMV (-25.00 to 125.00 %) Data range: -2500 to 12500
A+5
Mode setting MODE
FC840
Operation mode
00 : Manual mode
01 : Auto mode
10 : Cascade mode
11 : (Reserve)
Tracking designation
0 : No
1 : Yes
B
Proportional gain K
P
(0.00 to 327.67) Data range: 0 to 32767
B+1
Integral time T
I
(0.000 to 32.767 min.,
D
I
n
=0 if T
I
=0) Data range: 0 to 32767
B+2
Derivative time T
D
(0.000 to 32.767 min.) Data range: 0 to 32767
B+3
Gap (dead-band) GP (0.00 to 10.00 %) Data range: 0 to 1000
B+4
Auto mode initial set value ISV (0.00 to 100.00 %) Data range: 0 to 10000
B+5
Input filter constant FT (0.000 to 0.999) Data range: 0 to 999
B+6
ASV differential limit DSV (0.00 to 100.00 %/
D
t) Data range: 0 to 10000
B+7
MMV differential limit DMMV (0.00 to 100.00 %/
D
t) Data range: 0 to 10000
(If GP
¹
0, Gap is applied)
(If T
I
= 0, then
D
I
n
= 0)
(Fixed)
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