Mitsubishi Electric MELSEC iQ-R Series - Page 668

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APPX
Appendix 4 List of Special Relay Areas
SM1654 Memory copy being
executed
Off: Not executed
On: Being executed
• This relay is on during the memory copy from the
control system to the standby system.
• This relay turns off when the memory copy is
completed.
S (Status change)
SM1655 Memory copy
completion
Off: Not completed
On: Completed
• This relay turns on at the completion of the memory
copy from the control system to the standby system.
• Initial value is off: Memory copy has not completed.
S (Status change)/
U
SM1656 Auto memory copy Off: Disabled
On: Enabled
This relay turns on when the automatic memory copy
is set to enable.
S (Initial)
SM1673 Tracking transfer
completion flag
Off: Transfer not completed
On: Transfer completed
• This flag is stored a result of the tracking transfer
operated in the preceding END processing.
• The flag turns on if any of the tracking transfers in
block 1 to 64 has been normally completed, and
turns off if the tracking transfers failed due to causes
such as tracking communication error.
S (Status change)
SM1679 Error reset (the other
system)
OffOn: Standby system error reset
requested
OnOff: Standby system error reset
completed
• This relay is turned from off to on to clear a
continuation error occurred in the standby system.
• This relay turns from on to off when the error reset
has been completed.
• Initial value is off.
U/S (Status
change)
SM1680 Error of the other
system monitoring
Off: No error
On: Error
• This relay turns on if an error occurs on
communications with the other system when an
initial processing (including when the system is
determined while waiting for the other system starts
up) or an END processing is performed. (This relay
turns on when the bit of SD1648 turns on.)
• This relay turns off when an error is cleared.
S (Initial/every
END/system
switching)
SM1681 Latest self-diagnostic
error (including
annunciator ON) (the
other system)
Off: No error
On: Error
• This relay turns on if a diagnostic error occurs in the
CPU module in the other system. (The relay also
turns on if an error is detected by an annunciator.)
• The SM0 status for the CPU module in the other
system is reflected.
S (Every END)
SM1682 Latest self-diagnostic
error (not including
annunciator ON) (the
other system)
Off: No error
On: Error
• This relay turns on if a self-diagnostic error occurred
in the CPU module in the other system. (The relay
remains off if an error is detected by an
annunciator.)
• The SM1 status for the CPU module in the other
system is reflected.
S (Every END)
SM1683 Detailed information
1: Flag in use (the
other system)
Off: Not used
On: In use
• This relay turns on when there is detailed
information 1 for an error occurred in the CPU
module in the other system.
• The SM80 status for the CPU module in the other
system is reflected.
S (Every END)
SM1684 Detailed information
2: Flag in use (the
other system)
Off: Not used
On: In use
• This relay turns on when there is detailed
information 2 for an error occurred in the CPU
module in the other system.
• The SM112 status for the CPU module in the other
syste
m
is reflected.
S (Every END)
SM1754 Waiting for the start-
up of the other
system
Off: Started up (own system)
On: Waiting for the start-up (the other
system)
• This relay turns on while waiting for the start-up of
the other system after powered on.
• This relay turns off under the following conditions.
 Own system starts up as the control system or
the standby system after succeeding in tracking
communications with the other system.
 Own system is started up as the control system
by a certain operation while waiting for the start-up
of the other system.
S (Status change)
SM1756 Wait timeout for
receiving cyclic data
after system
switching
*1
Off: No timeout
On: Timeout
This relay turns on when the receipt of the cyclic data
after system switching is not completed within the
cyclic data receipt waiting time
*2
while the setting to
wait cyclic data receive after system switching is
enabled. This relay turns off when the timeout does
not occur.
S (At system
switching)
No. Name Data stored Details Set by (setting
timing)