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(14) For redundant system (tracking)
Either the backup mode or the second mode is valid for SM1700 to SM1799.
All is turned off for stand-alone system.
Number
Name
Transfer trigger
OFF : Transfer not completed
SM1700
completion flag
ON : Transfer completed
Manual system
ON : Manual system
switching disable/
enable setting during
SM1709
online program
OFF : Manual system
change redundant
tracking
Transfer tracking data
OFF : No device tracking
SM1710
during online program
ON : Transfer device
change enable flag
Table12.15 Special relay
Meaning
• Turns on for one scan, once transfer of block 1 to
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
conditions is executed even during online
switching enabled
program change redundant tracking, regardless of
(Disable canceled)
the status of this relay.
•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
tracking execution status
•File batch online program change redundant
tracking execution status
(1)
Set whether the tracking of the following data will
be executed or not during online program change
redundant tracking.
•Device memory
(Including SM/SD that will automatically execute
tracking)
•PIDINIT information, S.PIDINIT information, SFC
information
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.
CHAPTER12 SPECIAL RELAY LIST AND SPECIAL REGISTER LIST
Explanation
(When Set)
S (status change)
S (When
executed)/U
Corres-
ponding
Set by
Corresponding
ACPU
CPU
M9
New
QnPRH
U
12 - 24
1
2
3
12
6
7
8
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