Mitsubishi Electric MELSERVO-J4 series, Instruction Manual

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17 APPLICATION OF FUNCTIONS
17.1 Scale measurement function
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How to use scale measurement function
Selection of scale measurement function
The scale measurement function is set with the combination of basic setting parameters [Pr. PA01] and [Pr. PA22].
■
Operation mode selection
The scale measurement function can be used during semi closed loop system (standard control mode). Set [Pr. PA01] to "_ _
0 _".
■
Scale measurement function selection
Select the scale measurement function. Select "1 _ _ _" (Used in absolute position detection system) or "2 _ _ _" (Used in
incremental system) according to the encoder you use.
Selection of scale measurement encoder communication method and polarity
"Encoder pulse count polarity selection" in [Pr. PC27] is not related to [Pr. PA14 Rotation direction selection].
Make sure to set the parameter according to the relationships between servo motor and linear encoder/rotary
encoder.
The communication method differs depending on the scale measurement encoder type. For the communication method for
using a linear encoder as scale measurement encoder, refer to "Linear Encoder Instruction Manual". Select "Four-wire type"
because there is only four-wire type for synchronous encoder.
Select the cable to be connected to CN2L connector in [Pr. PC26].
Select a polarity of the scale measurement encoder with the following "Encoder pulse count polarity selection" and "Selection
of A/B/Z-phase input interface encoder Z-phase connection judgment function" of [Pr. PC27] as necessary.
Operation mode selection
[Pr. PA01]
1 0 0
Standard control mode
Setting value
0
Operation mode
Servo motor-side
resolution unit
Control unit
Scale measurement function selection
0: Disabled
1: Used in absolute position detection system
2: Used in incremental system
0 0 0
[Pr. PA22]
0 0
[Pr. PC26]
Load-side encoder cable communication method selection
0: Two-wire type
1: Four-wire type
When using a load-side encoder of A/B/Z-phase differential output method, set "0".
Incorrect setting will trigger [AL. 70] and [AL. 71].
Setting "1" while using an MR-J4-_GF_ servo amplifier will trigger [AL. 37].
0