6F3B0253
Basic Hardware and Function 221
7. Instructions
PID algorithm:
∆∆∆∆
∆
MV K P I D
MV MV MV
nnnn
nn n
P
=⋅ ++
=±
−
()
1
Here,
∆Pee
eSVPV
nnn
nnn
=−
=−
− 1
∆
∆
I
etIr
T
n
n
I
=
⋅+
∆
∆
∆
∆
D
TPV PV tD Dr
tT
DD D
n
nn n
nn n
D
D
=
⋅−−⋅+
+⋅
=+
=
−−
−
()
.
11
1
01
η
η
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., ∆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 %/∆t) Data range: 0 to 10000
B+7 MMV differential limit DMMV (0.00 to 100.00 %/∆t) Data range: 0 to 10000
(If GP ≠ 0, Gap is applied)
(If T
I
= 0, then ∆I
n
= 0)
(Fixed)
