Mitsubishi Electric Q80BD-J61BT11N, Руководство пользователя

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App - 47 App - 47
MELSEC
APPENDIX
Appendix 4 Communication with the Redundant CPU
This section explains communication with the Redundant CPU when the CC-Link Ver.2
board is used.
(1) Incorporation into redundant system
In a Redundant CPU system, be sure to set the CC-Link Ver.2 board to a local
station.
Control system Standby system
Tracking cable
Master station Standby master station
Terminal resistor Terminal resistor
Station No. 0 Station No. 1 Station No. 2
Master/local interface board
CC-Link
(2) Access to the Redundant CPU
(a) Redundant CPU specify
To access the Redundant CPU, directly specify the station number of the
CC-Link module mounted on the station of the target Redundant CPU.
(b) Action to be taken at occurrence of system switching
After system switching, the Redundant CPU in the same system (control
system or standby system) can also be accessed by directly specifying the
station number that was specified before system switching.
1
1: When system switching occurs in the Redundant CPU system to be
accessed, the station number of the CC-Link module mounted on the
station of each Redundant CPU is also changed internally.
(Example) When the Redundant CPU in the control system is accessed
Before system switching
Tracking cable
Master station Standby master station
Terminal resistor Terminal resistor
Station No. 0 Station No. 1 Station No. 2
Master/local
interface board
CC-Link
Standby
system
Control
system
After system switching
Tracking cable
Master station Standby master station
Terminal resistor Terminal resistor
Station No. 1 Station No. 0 Station No. 2
Master/local
interface board
CC-Link
Standby
system
Control
system
Control
system
Standby
system