Encoder Output Pulse Setting - YASKAWA Σ-V Series User Manual

4 Operation

4.2.6 Encoder Output Pulse Setting

4.2.6

Encoder Output Pulse Setting

Set the encoder output pulse using the following parameter.
Pn281
Set the encoder output pulse for encoder output pulse signals (PAO, /PAO, PBO, /PBO) externally from the
SERVOPACK.
Feedback pulses per linear scale pitch (Pn282) are divided inside the SERVOPACK by the value set in Pn281
before being output. Set according to the system specifications of the machine or host controller.
The setting range varies with the linear servomotor maximum speed (Pn385) and linear scale pitch (Pn282).
The upper limit value for Pn281 can be obtained by the following equation.
Upper limit value for Pn281 =
Note 1. When the scale pitch is 4 μm, the motor maximum speed is limited to 1 ms/s because of the maximum response
2. If the set value is out of the setting range or does not satisfy the setting conditions, the alarm "Encoder Output
3. The upper limit of encoder output resolution is limited by the frequency dividing specification of serial converter
4. When an absolute linear scale made by Mitutoyo Corporation is used, the linear scale pitch becomes the value
Setting Example
When the linear scale pitch = 20 μm (Pn282 = 20.00) and the motor maximum speed = 5 m/s (Pn385 = 50),
Pn281 = 28 is accepted, but Pn281 = 29 is not accepted and A.041 is output.
Output Example
When Pn281 = 20 (20-edge output (5-pulse output) per linear scale pitch),
Preset value 20
PAO
PBO
Linear scale
pitch (Pn282)
4-14
Encoder Output Resolution
Setting Range
1 to 4096
Pn282
Pn385
frequency of serial converter unit.
Pulse Setting Error" (A.041) is output.
If the motor speed exceeds the upper limit value according to the set encoder output resolution, the alarm "Over-
speed of Encoder Output Pulse Rate" (A.511) is output.
unit.
"
which is obtained by resolution (μm/pulse)
Setting Unit Factory Setting
1 edge/pitch 20
× 72
×
"
512. (The set value in Pn282 becomes invalid.)
Force
Speed Position
When Enabled
After restart
Classification
Setup