Mitsubishi Electronics QD75P, QD75D Sequence program, Pstrt instruction Execution completion

14 DEDICATED INSTRUCTIONS

MELSEC-Q

		END			END			END			END
Sequence program	processing			processing			processing processing
			ON			PSTRT instruction
						execution completion
PSTRT instruction	OFF
									ON
	OFF
Complete device										When
									ON	completed
										abnormally
Complete state display OFF										When
									completed normally
device										1 scan

[Errors]

(1)When an 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 15.2 "List of error codes".

[Precautions]

(1)When positioning is started by the PSTRT instruction, the positioning start signals (Y10 to Y13) and start complete signals (X10 to X13) will not turn ON. To confirm that positioning control is being executed, use the PSTRT start command or BUSY signals (XC to XF).

(2)If, after positioning has been started by the PSTRT instruction, a stop command is input before positioning is complete, the complete device (D) turns ON one scan and the execution of the 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 (PSTRT1 to PSTRT4)

•Absolute position restoration instructions (ABRST1 to ABRST4)

•Teaching instructions (TEACH1 to TEACH4)

(4)The PSTRT instruction can only be executed when the QD75 READY signal (X0) is turned ON.

Even if the PSTRT instruction execution request is given when the QD75 READY signal is turned OFF, the PSTRT instruction will not be executed. (not processed.)

Before executing the PSTRT instruction, turn ON the PLC READY signal (Y0), and turn ON the QD75 READY signal (X0).

(5)When the remote I/O station (Q Corresponding MELSECNET/H network remote

I/O module) is used, the dedicated instruction (PSTRT) is unusable.

: For details of the remote I/O station, refer to Q Corresponding MELSECNET/H Network System Reference Manual (Remote I/O Network).

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