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There are two ways of wiring a motor to the
DCP31
: wiring for direct motor rotation and wiring
for reverse motor rotation. When wired for direct motor rotation, the motor rotates in clockwise
(CW ) direction when
DCP31
output increases. There are two ways of making the motor ro-
tate in the reverse direction (counterclockwise: CCW) depending on your control requirements
(e.g. cooling control):
• By switching the control operating direction on the
DCP31
with the motor wired to the
DCP31
for direct motor rotation as it is, or
• By wiring the motor to the
DCP31
for reverse motor rotation.
The control operating direction (direct/reverse) can be switched on this controller. If the motor
is wired to the controller for direct motor rotation, the
DCP31
can be easily set up for control in
either direction. This makes it easier to remedy trouble that may occur during controller opera-
tion. For this reason, we recommend wiring the motor to the
DCP31
for direct motor operation.
CW: Clockwise ( )
CCW: Counterclockwise ( )
The
DCP31
is also provided with a function (
A
L
1
0
to
A
L
1
2
) for detecting MFB disconnec-
tion or short-circuit if the motor has been wired to the controller in the wrong way.
By this function, the
DCP31
judges reverse direction wiring in the same way as direct direction
wiring, and does not generate an alarm. If the setting of variable parameter
.-C
is left at the
factory setting (“0”), motor operation is continued.
The following tables summarize the phenomena that occur according to how the motor and
DCP31
are wired when the motor is automatically adjusted (variable parameter
.-A
T
setting
1 is input). Motor rotation is started from the fully closed position (motor is turned as far as
possible CCW).
The values displayed in the lower display in the tables are only examples. Alarms are displayed
after the motor fully closes or fully opens.
11
12
13
14
15
16
2
3
1
Y
T
G
14
16
Y
G
CCW closed
CW open
CCW closed
CW open
CCW closed
CW open
CCW closed
CW open
Wiring for direct motor rotation
DCP31
Wiring for reverse motor rotation
DCP31
Motor
Motor
15
T
24Vac
24Vac
2
3
11
13
12
1
9-12
Chapter 9. MAINTENANCE & TROUBLESHOOTING
9 - 4
Motor Adjustment is Impossible