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2. Expanded Functions
Control block diagram
Auto
mode
ASV
DSV
Differential
SV
n
CSV
Cascade
mode
PV
Integral action control:
When MV is limited (H/L, DMV) and the integral value has same sign as limit over, integral action
is stopped.
Velocity
Position conversion:
In Direct mode, MV increases when PV is increased.
In Reverse mode, MV decreases when PV is increased.
Gap (dead-band) operation:
Algorithm
Digital filter:
PV
(
1
FT PVC FT PV
)
n
Here,
0
FT
52
PROSEC T3H
Integral
1
T
s
I
Proportional
+
e
n
Gap
1
-
Derivative
T
s
D
1+ T
s
D
( = 0.1)
n
1
1+T s
Digtal filter
Error e
GP (%) GP (%)
n
1
1
Integral
control
I
n
MV
n
+
P
MV
n
+
n
K
MVS
P
-
MMV
D
n
MVS: Velocity
PVC
MV
H/L:
Upper / lower limit
DMV: Differential limit
MV
MV
SV - PV
MVC
n
H/L
DMV
DMMV
Manual
Differential limit
mode
Position
= MV
MV
n
n-1
n
= MV
- MV
n
n-1
n
= MV
+ MV
n
n-1
n
MV
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