7-20
Chapter 7. PARAMETER SETUP
• The MFB disconnected alarm does not occur.
• The error between actual motor valve opening and estimated MFB
value is compensated by forcibly continuing motor operation in
the closed or open directions when MV is 0.0 % and 100 %.
●
●
.-A
t
(motor valve opening automatic adjustment)
0: Adjustment disabled
1: Adjustment enabled
This parameter automatically measures the motor fully closed
position, fully open position, and close-open times. The results of
calculation are automatically written to
.-C
L
,
.-O
P
and
.-t
.
• Adjustment Method and Motor Functions
1. Set
.-C
to 0 or 1.
2. Set
.-A
t
to 1, and press
ENT
.
If set to 1 already, press
ENT
twice to enter automatic adjust-
ment.
3. Automatic adjustment is carried out.
-
C
A
.C
L
is displayed on the upper display, and the closed-side
relay turns ON.
- The motor operates to the closed side, and the MFB count
value is displayed on the lower display. When the count has
stabilized, fully closed adjustment is completed, and the
count value is written to
.-C
L
.
-
C
A
.O
P
is displayed on the upper display, and the closed-
side relay turns ON.
- The motor operates to the open side, and the MFB count
value is displayed on the lower display. When the count has
stabilized, fully open adjustment is completed, and the count
value is written to
.-O
P
.
The time it took from fully closed to fully open is written to
.-t
. However, note that if this time is 240.0 s or more, the
time is taken as 240.0 s.
- When all adjustments are completed, the controller returns
to the basic display state.
4. To cancel automatic adjustment, press
DISP
.
When automatic adjustment begins, you cannot press any keys
other than
DISP
.
DISP
is used for canceling adjustment.
The following instances are regarded as errors. In these in-
stances, the factory settings are returned to, and
A
L
1
2
is
displayed. The
A
L
1
2
display can be cleared only when auto-
