Mitsubishi Electric Q80BD-J61BT11N, User Manual

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