Fig. 7: Position Feedback Signal Flow, With Encoder - Curtis 1220 Manual

3 — PROGRAMMABLE PARAMETERS:
PARAMETER
Encoder Steps
Swap Encoder Direction
Encoder Fault Check
-180.0° – 180.0°
Center Offset (deg)
Encoder Filter A
Steer Motor
Encoder Phase A
(Pin J1-2)
Encoder Filter B
Steer Motor
Encoder Phase B
(Pin J1-9)
Fig. 7
Position feedback signal flow, with motor encoder.
16
Feedback Device Parameters
FEEDBACK DEVICE: ENCODER
ALLOWABLE
RANGE
2.0 – 256.0 Sets the number of encoder pulses per revolution of steering motor rotor.
Off / On This parameter changes the encoder's effective direction of rotation.
It must be set such that when the tiller head is turning right, the steer motor
speed is positive.
Off / On The Encoder Fault Check parameter applies only to quadrature encoders
(Position Feedback Device = 2).
It disables/enables the encoder fault check function, which can be used
to detect single wire open of Encoder Phase A or B.
The Center Offset is the difference between the zero position (center)
for the application and the home reference position (found during homing).
During homing, the home position is found and once the homing is
completed the zero position is offset from the home position by adding the
Center Offset to the home position. All subsequent absolute moves shall
be taken relative to this new zero position, including Auto Center. If the
home switch is at the same position as center, set Center Offset to zero.
Quadrature Decoder
A/B
φ
DESCRIPTION
Home
Position
Center Offset
Center Offset
Encoder Counts
from Home
-1
+
-
Swap Encoder Direction
Home Position
Encoder Steps
Zero
Position
Encoder Degrees
from Home
+
-
Center Offset (deg)
Curtis 1220 Manual,
Rev. C