Yaskawa JAPMC-MC2300 - Manual (Page 366)

Appendix D Terminology
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Appendix D Terminology
Phase-C Pulse
The encoders mounted on Yaskawa’s servomotors output three types of pulse data, phase-A, -B, and -C. Phase-C pulse
is a signal that reverses once per motor rotation and is called Zero-point Pulse.
POSMAX
Reset position of infinite length axis
Refer to 5.4.1 Motion Fixed Parameter Details on page 5-17 for details.
Override
The original meaning of Override is annulling. In descriptions on Machine Controllers, override means overwriting the
setting.
Machine Coordinate System
The basic coordinate system set by executing the motion command ZRET (Zero Point Return) or ZSET (Set Zero
Point). The Machine Controller manages positions using the Machine Coordinate System.
With a system using an incremental encoder, or absolute encoder as the incremental encoder, the Machine Coordinate
System is automatically set by the first zero point return operation after the power turns ON.
With the system using an absolute encoder, it is automatically set after the power turns ON.
Deceleration LS
Limit switch for deceleration.
For SERVOPACKs, deceleration LS for zero point return is connected to the Zero Point Return Deceleration signal
DEC.
Absolute Mode
One of target position coordinate data setting methods for position control. Target position coordinate data is directly
set in Absolute Mode.
Refer to 6.1.4 Position Reference on page 6-5 for details.
Incremental Addition Mode
One of the target position coordinate data setting methods for position control. Target position coordinate data is set by
adding the movement amount to the previous position reference value in Incremental Addition Mode.
Refer to 6.1.4 Position Reference on page 6-5 for details.
Infinite Length Axis
An axis that employs the infinite length position control method, which resets the position data after one motor rota-
tion.
Refer to 6.1.3 Axis Type Selection on page 6-4 for details.
Infinite Length Position Control
This control method is used to perform position control without limiting the movement range for movements such as
rotation in one direction.
Refer to 6.1.3 Axis Type Selection on page 6-4 for details.
Finite Length Axis
An axis that employs the finite length position control method or infinite length position control that does not reset the
position data after one motor rotation to move in one direction.
Refer to 6.1.3 Axis Type Selection on page 6-4 for details.
Finite Length Position Control
This control method is used to perform position control within a specified section for movements such as go-and-return
motions.