Mitsubishi Electric MELSERVO-J5 - Page 223

4 APPLICABLE FUNCTIONS
4.3 Scale measurement function [G] [B]
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Selecting a polarity of the scale measurement encoder
Select the polarity of the scale measurement encoder in [Pr. PC27.0 Encoder pulse count polarity selection] and set [Pr.
PC27.2 ABZ phase input interface encoder ABZ phase connection assessment function selection] shown below as required.
Precautions
[Pr. PC27.0 Encoder pulse count polarity selection] is not related to [Pr. PA14 Travel direction selection]. Set the parameter
according to the relationships between the servo motor, linear encoder, and rotary encoder.
■Selection of the encoder pulse count polarity
This servo parameter is used to set the polarity of the load-side encoder to be connected to CN2L or CN2AL to match the
CCW direction of the servo motor and the increasing direction of the load-side encoder feedback. For [Pr. PC27.0 Encoder
pulse count polarity selection], select "0" (Encoder pulse increasing direction in the servo motor CCW or positive direction) or
"1" (Encoder pulse decreasing direction in the servo motor CCW or positive direction).
■A/B/Z-phase input interface encoder Z-phase connection assessment function
This function triggers an alarm by detecting non-signal for Z phase.
The Z-phase connection assessment function is enabled in the initial state. The Z-phase connection assessment function can
be disabled with [Pr. PC27.2 ABZ phase input interface encoder ABZ phase connection assessment function selection].
Select "0" (enabled) or "1" (disabled) for [Pr. PC27.2] as needed.
■Resolution setting of scale measurement encoder
When using an A/B/Z-phase differential output rotary encoder as a scale measurement encoder, set the resolution in [Pr.
PE51 Load-side encoder resolution setting].
■Selection of use of A/B/Z-phase differential output type encoder as scale measurement
encoder [G]
If a serial encoder is connected to CN2 and an A/B/Z-phase differential output type encoder is connected to CN2L or CN2AL,
determine which encoder is to be used as a scale measurement encoder. Use [Pr. PC27.5 Scale measurement encoder
selection] to select whether the A/B/Z-phase differential output type encoder is to be used as a servo motor encoder or scale
measurement encoder as required.
No. Symbol Name Outline
PC27.0 **COP9 Encoder pulse count polarity selection Select a polarity of the load-side encoder.
Initial setting: 0 (Encoder pulse increasing direction in the servo motor CCW or positive
direction)
No. Symbol Name Outline
PC27.2 **COP9 ABZ phase input interface encoder
ABZ phase connection assessment
function selection
Select the non-signal detection status for the pulse train signal from the A/B/Z-phase input
interface encoder.
Initial setting: 0 (enabled)
No. Symbol Name Outline
PE51 **EDV2 Load-side encoder resolution setting Set the resolution of the load-side encoder.
Initial value: 0 [pulse]
No. Symbol Name Outline
PC27.5 **COP9 Scale measurement encoder selection Select a scale measurement encoder when using an A/B/Z-phase differential output type
encoder.
0: Use an A/B/Z-phase differential output type encoder as a scale measurement encoder
(Initial value)
1: Use a serial encoder as a scale measurement encoder
Servo motor
Linear encoder
Address increasing direction of linear encoder
Servo motor in CCW direction