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6F3B0250
238
T1/T1S User’s Manual
7. Instructions
Control block diagram
1
T
I
×
s
Differential limit
Derivative
Proportional
Integral
Differential
D
MV
n
(
h
= 0.1)
MVS: Velocity
®
Position
MV
n
= MV
n-1
±
D
MV
n
H/L: Upper / lower limit
DMV: Differential limit
MVC
n
MV
n
Manual
mode
Cascade
mode
Auto
mode
Digtal filter
MV
MMV
PVC
D
D
n
D
P
n
D
I
n
e
n
PV
n
SV
n
CSV
ASV
-
+
-
+
+
1
T
D
×
s
1+
h×
T
D
×
s
1
1+T
×
s
Gap K
P
MVS H/L DMV
DSV
DMMV
Integral
control
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.
®
MV
n
= MV
n-1
-
D
Mv
n
In Reverse mode, MV decreases when PV is increased.
®
MV
n
= MV
n-1
+
D
MV
n
Gap (dead-band) operation:
Error e
SV - PV
GP (%) GP (%)
Algorithm
Digital filter:
PV FT PVC FT PV
nn
=- × + × -
()1
1
Here,
0 000 0 999..
££
FT
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