Yaskawa MP940 - Manual (Page 322)

Absolute Position Detection
7.2.3 Initializing the Absolute Encoder
7-8
Multi-turn Limit
1
Setting (Pn205)
Sets the cycle of Infinite Length Axis in reference units. This parameter is enabled when an
absolute encoder is used and the Infinite Length Mode Axis is selected.
Machine Coordinate System Zero Point Offset (OLC006)
Determines the zero point position of a machine coordinate system. The meaning of this
parameter depends on the type of encoder that is used and whether the finite length Mode
axis or infinite length Mode axis is selected.
• ABS Finite Length Mode Axis
Setting parameter OLC006: Machine Coordinate System Zero Point Offset Setting is
always valid. The zero point for the machine coordinate system can be changed simply
by changing this parameter. This is why the zero point does not have to be set in ABS
Finite Length Mode.
• ABS Infinite Length Mode Axis
Setting parameter OLC006: Machine Coordinate System Zero Point Offset Setting is
valid while the zero point is set. While the zero point is set, the positive electronic gear
conversion value is used as the current machine coordinate system position.
Set the desired position at setting parameter OLC006: Machine Coordinate System Zero
Point Offset Setting.
7.2.3 Initializing the Absolute Encoder
Perform the setup operation for the absolute encoder in the following conditions:
• When starting the machine for the first time.
• When an encoder backup alarm is generated.
• When the SERVOPACK's power supply is turned OFF and the encoder's cable is
removed.
The setup operation can be performed by using the Hand-held Digital Operator, the SERVO-
PACK's Panel Operator, or the personal computer monitor software.
1 Multi-term limit
The upper limit of multi-turn data. If Pn002.2 = 0, multi-turn data will very between 0 and Pn205: Multi-turn Limit Set-
ting.
Finite
Length
Mode Axis INC axis Parameter (OLC006): ABS OFF is always enabled.
ABS axis Parameter (OLC006): ABS OFF is always enabled.
Infinite
Length
Mode Axis INC axis Parameter (OLC006): ABS OFF is always enabled.
ABS axis Only enabled when a zero point is set. (Used to define
ABS System Infinite Length Mode Axis Control
Data.)