Mitsubishi Electric D75D4, User Manual

Page: 652 / 896

14 - 10
MELSEC-Q
14 DEDICATED INSTRUCTIONS
END
processing
END
processing
END
processing
END
processing
OFF
OFF
OFF
ON
ON
ON
When
completed
abnormally
When
completed normally
1 scan
ZP.PSTRT instruction
execution completion
Sequence program
ZP.PSTRT instruction
Complete device
Complete state display
device
[Errors]
(1) When an ZP.PSTRT instruction is completed abnormally, the error complete
signal ((D)+1) is turned ON, and the error code is stored in the complete status
((S)+1).
Check and take a measure against the error referring to Section 15.3 "List of error
codes".
[Precautions]
(1) When positioning is started by the ZP.PSTRT instruction, the positioning start
signals (Y10 to Y13) will not turn ON.
Therefore, the start complete signal (X10 to X13) cannot be used for confirming
completion of start of positioning.
To confirm that positioning control is being executed, use the ZP.PSTRT start
command or BUSY signals (XC to XF).
(2) If, after positioning has been started by the ZP.PSTRT instruction, a stop
command is input before positioning is complete, the complete device (D) turns
ON one scan and the execution of the ZP.PSTRT instruction is completed.
(3) The following dedicated instructions cannot be executed simultaneously for the
same axis.
(Can be executed simultaneously for different axes.)
• Positioning start instructions (ZP.PSTRT1 to ZP.PSTRT4)
• Absolute position restoration instructions (Z.ABRST1 to Z.ABRST4)
• Teaching instructions (ZP.TEACH1 to ZP.TEACH4)
(4) The ZP.PSTRT instruction can only be executed when the QD75 READY signal
(X0) is turned ON.
Even if the ZP.PSTRT instruction execution request is given when the QD75
READY signal is turned OFF, the ZP.PSTRT instruction will not be executed.
(not processed.)
Before executing the ZP.PSTRT instruction, turn ON the PLC READY signal
(Y0), and turn ON the QD75 READY signal (X0).