Continuing The Data Link Even When The Master Station Is Faulty (Standby Master Function) - Mitsubishi Electric Q81BD-J61BT11 User Manual

4 FUNCTIONS
4.3.4 Continuing the data link even when the master station is faulty
(standby master function)
Data link control
by the master station
Master station
Data link control
in progress
Cyclic communication
Master station is down
Master station
Cyclic communication
4 - 25
This function enables the data link to continue by switching a faulty master station to a
standby master station (i.e. a backup station for the master station).
Note that, even if the master station has been restored, automatic switching from the
standby master station to the master station is not performed.
Remote I/O station
Station number 2
Number of occupied stations: 1
Data link control by the standby master station
Remote I/O station
Station number 2
Number of occupied stations: 1
In this section, the above system configuration will be used in the explanation.
POINT
Refer to "Section 2.2 (1)" for the combinations when using the CC-Link Ver.2 board
as the standby master station.
Remote I/O station
Station number 3
Number of occupied stations: 1
Cyclic communication
Remote I/O station
Station number 3
Number of occupied stations: 1
Cyclic communication
Standby master station
Station number 1
Number of occupied stations: 1
Standby
Cyclic communication
Standby master station
Station number: 1
Control in
Progress
Cyclic communication
MELSEC
0
4 - 25