14 DEDICATED INSTRUCTIONS

MELSEC-Q

Sequence program

ABRST instruction

Complete device

Complete state display device

(2)An I/O module is used for communication (data read/write) with the servo amplifier capable of processing the absolute positions.

When using the ABRST, prepare the input/output with the following number 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 complete devices ((D)+0) and ((D)+1).

(a)Complete device ((D)+0)

This 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.

(b)Complete state display device ((D)+1)

This device is turned ON and OFF according to the state in which ABRST

instruction is completed.

• When completed normally :Kept unchanged at OFF.

When completed abnormally:This 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

 

END

 

 

 

 

END

 

END

processing

processing

 

 

 

processing processing

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON

 

 

 

ABRST instruction

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

execution completion

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON

completed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

abnormally

OFF

 

 

 

 

 

 

 

 

 

 

 

 

When

 

 

 

 

 

 

 

 

 

completed normally

1 scan

The completion of absolute position restoration can be confirmed using the ((S)+4) "status".

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Mitsubishi Electronics QD75D, QD75P Output, Points, Processing processing, Abrst instruction Execution completion, Scan