Mitsubishi Electric MELSEC Q Series Programming Manual page 611

APPENDICES
(5) Precautions during control
(a) Absolute position system (ABS)/Incremental system (INC).
Set the ABS/INC settings with the AlphaStep/5-phase
1) Incremental system (INC)
When the Multiple CPU system power supply is turned OFF and
turned ON again, the home position request turns ON, and the feed
current value from the AlphaStep/5-phase is displayed.
2) Absolute position system (ABS)
a) "3: Servo command value" and "4: Feedback value" for [Pr.300]
Servo input axis type cannot be used. If they are used the current
value of the servo input axis may not be correctly restored therefore
use "1: Feed current value" and "2: Actual current value".
b) When control units are degree axis and the stroke limit is valid, the
following positioning controls may not operate correctly when they
are started, therefore do not use them.
Operating system software
"00L" or later
"00K" or later
(b) Home position return
1) Home position return operation types
The home position return methods that can be used in AlphaStep/5-
phase are shown below.
Proximity dog method
Count method
Data set method
Dog cradle method
Stopper method
Limit switch combined method
Scale home position signal detection method
Dogless home position signal reference method
Driver home position return method
(Note-1): Minor error (error code: 194) occurs, and home position return is not performed.
version
• Absolute specification instructions in speed-switching
control (VSTART instruction)
• Instructions for pass point absolute specifications in
constant-speed control (CPSTART instruction) (linear
interpolation, circular interpolation, helical interpolation)
• Position follow-up control (PFSTART instruction)
• Absolute specification instructions in speed-switching
control (VSTART instruction)
Home position return method
Proximity dog method 1
Proximity dog method 2
Count method 1
Count method 2
Count method 3
Data set method 1
Data set method 2
Stopper method 1
Stopper method 2
APP - 120
Positioning control
Possible/Not possible
(Note-1)
(Note-1)
(Note-1)
(Note-1)
(Note-1)
(Note-1)
(Note-1)
(Note-1)
(Note-1)
(Note-1)
(Note-1)
: Possible, : Not possible