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Chapter 7. PARAMETER SETUP
7-17
● M .-A t (motor valve opening automatic adjustment)
0: Adjustment disabled
1: Adjustment enabled
This parameter automatically measures the motor fully closed position, fully open posi-
tion, and close-open times. The results of calculation are automatically written to M .-C L,
M .-O P and M .-t.
• Adjustment Method and Motor Functions
1. Set M .-C to 0 or 1.
2. Set M .-A t to 1, and press
ENT
.
If set to 1 already, press
ENT
twice to enter automatic adjustment.
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 com-
pleted, and the count value is written to M .-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 M .-O P.
The time it took from fully closed to fully open is written to M .-t. However, note
that if this time is 240.0s or more, the time is taken as 240.0s.
- 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 instances, the factory set-
tings are returned to, and A L 1 2 is displayed. The A L 1 2 display can be cleared
only when automatic re-adjustment has ended successfully or when the power has
been reset.
- Fully closed count - fully open count < 500
- Fully closed count > fully open count
- Time from fully closed to fully open is less than 5s
- MFB disconnected alarm (A L 1 0, A L 1 1) occurs continuously or frequently
- The time taken for the MFB count to stabilize exceeds 5min
- Faulty wiring of MFB or switching relay
(However, note that all faulty wiring cannot be detected as an error.)
● M .-t (motor valve opening adjustment fully open/closed time)
When M .-C is set to 2, the set time is taken as the base for all operations. Enter the time
correctly in 0.1s units.