2 MOTION DEDICATED PLC INSTRUCTION
2.2 Motion Dedicated PLC Instruction
35
2
■Controls
• Request to start the servo program specified with (n2) program No.
• It is necessary to take an inter-lock by the start accept flag of CPU buffer memory and user device so that multiple
instructions may not be executed toward the same axis of the same Motion CPU No.
Refer to the start accept flag (system area) for details of the start accept flag. (Page 82 Start accept flag
(System area))
■Operation
Outline operation between CPUs at the MP.SVST and DP.SVST instruction execution is shown below.
• MP.SVST instruction
• DP.SVST instruction
*1 Set in [System Parameter] [Multiple CPU settings] in GX Works3
Request
data set
ON
MP.SVST execution
Sequence program
MP.SVST instruction
Servo program
END END
Axis start accept flag
(System area)
ON
Complete device (D1+0)
ON
Status display device (D1+1)
at the completion
CPU dedicated transmission
(Non-fixed cycle)
1 scan
ON: Abnormal completion only
Transfer
Response
data set
Servo program
executed processing
Sequence program
DP.SVST execution
ON
DP.SVST execution
Request data set
Servo program
END END
Axis start accept flag
(System area)
ON
Complete device (D1+0)
ON
Status display device (D1+1)
at the completion
CPU dedicated transmission
(Fixed cycle)
Communication
cycle
*1
1 scan
Transfer Transfer
Response
data set
ON: Abnormal completion only
Servo program
executed processing
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