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MELSEC-Q
14 DEDICATED INSTRUCTIONS
(2) An I/O module is used for communication (dat a read/write) with the servo amplifier
capable of processing the absolute positions.
When using the ABRST , prepare the input/output with the following num ber of
points, for each axis, for communication with the servo amplifier.
• Input : 3 points
• Output: 3 points
Refer to Section 12.6 for wiring of I/O signals.
(3) The ABRST instruction completion can be confirmed using the com plete devices
((D)+0) and ((D)+1).
(a) Complete device ((D)+0)
This device is turned ON by the END process ing of the scan for which
ABRST instruction is completed, and turned OFF by the nex t END
processing.
(b) Complete state display device ((D)+1)
This device is turned ON and OFF accordin g to the state in which ABRST
instruction is completed.
• When completed normally :Kept unchanged at OFF.
• When completed abnormally:T his device is turned ON by the END
processing of the scan for which ABRST
instruction is completed, and turned OFF by
the next END processing. (same ON/OFF
operation as complete device).
END
processing END
processing END
processing END
processing
OFF
OFF
OFF
ON
ON
ON
When
completed
abnormally
When
completed normally
1 scan
ABRST instruction
execution completion
Sequence program
ABRST instruction
Complete device
Complete state display
device
The completion of absolute position restor ation can be confirmed using the ((S)+4)
"status".