Yaskawa Sigma-5 User Manual: Design and Maintenance - Linear Motors - Manual (Page 102)

4 Operation
4.2.5 Encoder Output Pulse
4-12
4.2.5 Encoder Output Pulse
The encoder pulse output is a signal that is output from the linear scale and processed inside the SERVO-
PACK. It is then output externally in the form of two phase pulse signal (phases A and B) with a 90 ° phase dif-
ferential. It is used as the position feedback to the host controller.
Signals and output phase form are as shown below.
(1) Signals
∗ For details on phase C (origin pulse), refer to (3) Encoder Output Signals from SERVOPACK with a Linear Scale by
Renishaw.
(2) Output Phase Form
Note: The pulse width of the phase C (origin pulse) changes according to the setting of the Pn281 and becomes the same as
that for phase A.
Even in reverse movement mode (Pn000.0 = 1), the output phase form is the same as that for the standard setting
(Pn000.0 = 0).
(3) Encoder Output Signals from SERVOPACK with a Linear Scale by Renishaw
The output position of the zero point signal (Ref) may vary in some models of the linear scale made by Ren-
ishaw.
If using a Renishaw model, the phase-C pulses of the SERVOPACK are output at two positions.
For details on the specifications of the zero-point signals for a linear scale, refer to the manual for the Ren-
ishaw linear scale.
Type
Signal
Name
Connector
Pin Number
Name Remarks
Output
PAO CN1-17
Encoder output pulse: phase A
The resolution of the pulse output
from the SERVOPACK to the host
controller is set in the parameter for
the encoder output resolution
(Pn281). Phase A and phase B are
different from each other in phase by
an electric angle of 90 °.
/PAO CN1-18
PBO CN1-19
Encoder output pulse: phase B
/PBO CN1-20
PCO CN1-21
Encoder output pulse: phase C
* −
/PCO CN1-22
CN1 CN2
PAO
PBO
PCO
SERVOPACK Host controller
Serial
data
Linear
scale
Converts
serial
data to
pulse. Dividing
circuit
(Pn281)
ENC
Serial
converter unit
Linear
Phase A
Phase B
Phase C
90°
t
Phase A
Phase B
Phase C
t
Forward movement (phase B leads by 90°) Reverse movement (phase A leads by 90° 㧕
90°