Mitsubishi Electric Q81BD-J61BT11 User Manual page 310

APPENDIX
App - 48
POINT
Create a program to monitor which system in the redundant CPU system is
accessed from the CC-Link Ver.2 board.
Control
 Indicates the CPU module operation status
system
SM
 Remains ON/OFF even if the tracking cable is disconnected while the
judgment
1515
redundant system is running.
flag
Standby
SM system
SM1515
judgment
1516
SM1516
flag
(3) Retry processing for error that will occur during system switching
processing
Any of the following errors will occur when the MELSEC data link library is used
to access the Redundant CPU during system switching processing.
Examples of errors that will occur in redundant CPU
 A system switching error
 CPU starting error
 Other system CPU module error (Error code 4245
 Access destination illegal error
Examples of errors that will occur in CC-Link Ver.2 board or module
 Response timeout
 Corresponding station error during sending (Error code B201
 Transient target station error
When an error has occurred, confirm the error code, and create a user program
for retry processing as necessary.
(a) The following indicates the functions that will result in error if
executed during system switching.
MELSEC data link library
Control Standby At the time of TRK.CABLE ERR.(Error code:
system system 6120) occurrence (System not determined.)
ON OFF
OFF ON
(Error code 4248
(Error code 4004
(Error code FFDF
(Error code B778
(Error code B205
Functions that will result in error by system switching
mdControl,mdDevRst,mdDevSet,mdRandR,mdRandW,
mdReceive,mdSend,mdTypeRead
MELSEC
OFF
OFF
)
H
)
H
)
H
)
H
)
H
)
H
)
H
App - 48