Mitsubishi Electric MELSEC-Q Series User Manual page 146

(i) Data link start function using a standby master station
• Parameters and program set in the master station and standby master station
Set the same parameters and program in the master station and standby master station. If not, the
operation is not guaranteed.
• Line test
When the data link start function by a standby master station is used, a line test cannot be executed using
the switch on the master/local module. Use a programming tool to execute a line test.
(
(j) Processing that sets the link devices saved at master switching and Refresh
instruction at standby master switching
After saving the link devices, wait a fixed number of scans and execute the processing that sets the link
devices saved at master switching and Refresh instruction at standby master switching (SB0001). Number of
scans for waiting after saving the link devices differs depending on the mode setting. Use the following values.
Mode setting
Remote net Ver.1 mode
Remote I/O net mode
Remote net Ver.2 mode
Remote net additional mode
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Page 86, Section 6.5.1 (1))
Number of scans for waiting
(Link scan time / Sequence scan
time) (Rounded up to the nearest
Fixed to 0
• For link scan time, use the maximum value after
master switching (after system switching when the
Redundant CPU is used (when only one of the
two systems is down)).
• For sequence scan time, use the minimum value
integer) × 4
after master switching (after system switching
when the Redundant CPU is used (when only one
of the two systems is down)).
Remark
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