Mitsubishi Electric Melsec Q Series Programming Manual page 181

3 MOTION DEDICATED PLC INSTRUCTION
The start accept flag is set after instruction acceptance of by the Motion
CPU as follows.
Sequence program
DP.SVST instruction
Start accept flag
(System area)
CPU dedicated transmission
(0.88ms cycle)
Servo program
Complete device (D1+0)
Status display device (D1+1)
at the completion
The start accept flag does not turn ON until the instruction accepting of
instruction is completed by the Motion CPU after instruction execution by
the PLC CPU.
Therefore, use a user device created interlock as required to prevent the
execution of the next Motion dedicated PLC instruction and avoid a same
axis double start error.
[Program example]
Program which executes continuous start of servo program No.11 for Axis 1 of the Motion
CPU (CPU No.2), while X0 is ON.
U3E1
X0 \G516.0
Instruction Start accept
execution flag of CPU
command No.2(Axis 1)
M100
Complete
device
DP.SVST execution
ON
Request data set
ON
Transfer Transfer
0.88ms
Response
data set
M10
DP.SVST
Interlock
3 - 70
END END
Servo program executed processing
ON
ON : Abnormal completion only
1 scan
H3E1 "J1" K11 M100 D100
SET M10
Interlock
RST M10
Interlock