Mitsubishi Electric MDS-E Series Instruction Manual page 152

MDS-E/EH Series Instruction Manual
4 Setup
(3) Setting of the installation polarity of the machine side encoder
Since the installation polarity may not be judged from the encoder appearance, confirm the installation polarity of
the machine side encoder with moving the axis by hand after the installation.
If "Motor end FB" or "Machine end FB" on the NC drive monitor screen changes to the opposite polarity when the
axis is moved, set "SV017/bit4" to "Reverse polarity".
【#2217(PR)】 SV017 SPEC1 Servo specification 1
bit 4 : sdir Sub side encoder feedback
0: Forward polarity 1: Reverse polarity
(4) Setting of the machine side encoder alarm detection
When using a rectangular wave linear scale, set the following parameters.
The rectangular wave scale determined no signal by the difference from the motor end FB. Set no signal 2 special
detection width considering a delay of machine end position generated by the torsion of the ball screw.
【#2235】 SV035 SSF4 Servo function 4
bit 7 : ckab No signal detection 2
Set this to use rectangular wave output linear scale.
This enables the detection of No signal 2 (alarm 21).
0: Disable
【#2398】 SV198 NSE No signal 2 special detection width
Set the special detection width for the no signal 2 (alarm 21).
When "0" is set, the detection will be performed with a 15μm width.
---Setting range---
0 to 32767 (μm)
1: Enable
121 IB-1501229-F