Mitsubishi Q01CPU User Manual page 622

Melsec-q series, qcpu
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12
TROUBLESHOOTING
(15)For redundant system (Tracking)
Number
Name
Tracking execution
flag
SM1700
Transfer trigger
completion flag
Manual system
switching disable/
enable setting during
SM1709
online program
change redundant
tracking
Transfer tracking data
SM1710
during online program
change enable flag
12
- 298
12.7 Special Relay List
Either the backup mode or the separate mode is valid for SM1700 to SM1799.
All is turned off for stand-alone system.
Table12.42 Special relay
Meaning
OFF : Execution not possible
• Turns on when tracking can be normally executed.
ON : Execution possible
OFF : Transfer not completed
• Turns on for one scan, once transfer of block 1 to
ON : Transfer completed
block 64 is completed.
(1)
Turning this relay from OFF to ON enables
manual system switching during online program
change redundant tracking.
After the manual system switching disable status
is canceled, the system automatically turns off
SM1709.
(2)
System switching due to any of the following
ON : Manual system
conditions is executed even during online
switching enabled
program change redundant tracking, regardless of
(Disable canceled)
the status of this relay.
OFF : Manual system
•Power off, reset, hardware failure, CPU stop error
switching disabled
(3)
In either of the following statuses, the system
switching disable status can also be canceled by
this relay.
•Multiple-block online program change redundant
•File batch online program change redundant
(1)
Set whether the tracking of the following data will
be executed or not during online program change
redundant tracking.
•Device memory
OFF : No device tracking
•PIDINIT information, S.PIDINIT information, SFC
ON : Transfer device
memory
(2)
SM1710 can be also used to set whether tracking
will be executed or not while online change of
multiple program blocks or batch of files is being
performed to ensure consistency of both systems.
(3)
This SM is also transferred form control system
CPU module to standby system CPU module by
tracking data.
Explanation
tracking execution status
tracking execution status
(Including SM/SD that will automatically execute
tracking)
information
Corres-
ponding
Set by
Corresponding
ACPU
(When Set)
M9
S (status change)
New
S (status change)
S (When
executed)/U
New
U
CPU
Q4AR
QnPRH

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