Mitsubishi Electric MR-J4 Instruction Manual page 570

17. APPLICATION OF FUNCTIONS
17.3.3 How to use scale measurement function
(1) Selection of scale measurement function
The scale measurement function is set with the combination of basic setting parameters [Pr. PA01] and
[Pr. PA22].
(a) Operation mode selection
The scale measurement function can be used during semi closed loop system (standard control
mode). Set [Pr. PA01] to "_ _ 0 _".
(b) 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.
(2) Selection of scale measurement encoder communication method and polarity.
For MR-J4-_B_-RJ servo amplifiers, set the following "Load-side encoder communication method
selection" of [Pr. PC26] as necessary.
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].
[Pr. PA01]
1 0 0
Operation mode selection
Setting value
0
[Pr. PA22]
0 0 0
Scale measurement function selection
0: Disabled
1: Used in absolute position detection system
2: Used in incremental system
[Pr. PC26]
0 0 0
Load-side encoder cable communication method selection
0: Two-wire type
1: Four-wire type
When using an 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-_B_ servo amplifier will trigger [AL. 37].
17 - 69
Operation mode
Semi closed loop system
(Standard control mode)
Control unit
Servo motor-side
resolution unit