Mitsubishi Electric Melsec Q Series User Manual page 119

4 WHEN THE Q/LCPU ACCESSES THE PROGRAMMABLE CONTROLLER
OF ANOTHER STATION USING THE DATA LINK INSTRUCTION
Sequence scan
Read command
Local station
programmable
Read completion device
controller CPU
(Device specified with (D2))
Read completion device
((D2)+1 device)
Completion status
((S1)+1 device)
Ethernet
module
Sequence scan
Write command
Write completion device
Local station
(Device specified with (D2))
programmable
controller CPU
Write completion device
((D2)+1 device)
Write data storage device
(Device specified with (S2))
Completion status
((S1)+1 device)
Ethernet
module
4 - 28
(b) When abnormal completion
1) READ instruction, SREAD instruction
READ
0 END 0
Channel 1
Target station
error
2) WRITE instruction, SWRITE instruction
WRITE
0 END 0
3000
Target station
error
END 0
?
END 0
?
Channel 1
MELSEC-Q/L
END 0 END 0 END
1 scan
Error code
END 0 END 0 END
1 scan
Error code
4 - 28