6F3B0250
238 T1/T1S User’s Manual
7. Instructions

Control block diagram

1
TI×s
Differential limit
Derivative
Proportional
Integral
Differential DMVn
(h = 0.1)
M VS: Velocity ® Position
MVn = MVn-1 ± DMVn
H/L: Upper / lower limit
DMV: Differential limit
MVCn
MVn
Manual
mode
Cascade
mode
Auto
mode
Digtal filter
MV
MMV
PVC
DDn
DPn
DIn
en
PVn
SVn
CSV
ASV
-
+
-
+
+
1
TD×s
1+TD×s
1
1+T×s
Gap KPMVS 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. ® MVn = MVn-1 - DMvn

In Reverse mode, MV decreases when PV is increased. ® MVn = MVn-1 + DMVn

Gap (dead-band) operation:

Error e
SV - PV
GP (%) GP (%)

Algorithm

Digital filter:

PV FT PVC FT PV

nn
=- × + × -

()11

Here, 0 000 0 999..

££

FT

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