Programming; Precautions On Programming - Mitsubishi MELSEC-Q Series User Manual

8 PROGRAMMING

8 PROGRAMMING

8.1 Precautions on Programming

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This chapter explains common items relating to programming.
The following explains precautions on the creation of a program:
Create a program that allows the detection of data-link status and interlocking with the
remote I/O stations, remote device stations, local stations, intelligent device stations,
and standby master station.
In addition, create an error-handling program.
[Program example]
Set the "Special Relay (SB) Refresh Device" to "SB0" and the "Special Register
(SW) Refresh Device" to "SW0" of the master station with GX Developer.
POINT
When setting the refresh devices of the special relay (SB) and the special register
(SW) to SB and SW, respectively, make sure that they do not duplicate with device
numbers on the MELSECNET/H network.
Module ready
Host data link status
Xn0 XnF Xn1
Error-handling program
M0
Station number 1 normal operation program
M1
Station number 2 normal operation program
SW80 to SW83 (Other station data link status)
BM0V SW80 K4M0 K4
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