Mitsubishi Electric MELSEC iQ-R Series User Manual page 163

No. Name
SD1649 System switching
cause (when the
systems are
successfully
switched)
SD1654 Memory copy
completion status
SD1681 Latest self-diagnostic
error code (the other
system)
SD1682 to Latest self-diagnostic
SD1688 error time (the other
system)
SD1689 Detailed information
1 information
category (the other
system)
SD1690 to Detailed information
SD1720 1 (the other system)
Description Details
System switching System switching cause is stored.
cause (when the • When the systems are switched, the cause
systems are for system switching is stored in 'System
successfully switching cause (when the systems are
switched) successfully switched)' (SD1649) of both
systems.
• This register is cleared to 0 when the
system is powered on and off or reset.
• The following shows the values stored in
this register.
0: Initial value (the control system never
been switched)
1: Reset or hardware failure of the remote
head module
2: Moderate error or major error
3: System switching due to data link error
16: Follow the system switching of the
redundant line master station.
17: System switching request from the
engineering tool
When the systems are switched by resetting
the control system, "1" is not stored in
'System switching cause (when the systems
are successfully switched)' (SD1649) of the
new standby system.
Memory copy This register stores the execution status of
completion status the memory copy.
When the value other than 0 is stored, the
memory copy is completed with an error or
cannot be executed.
0: Memory copy completed normally
4241H: Power-off of the standby system
4247H: Memory copy being executed
4248H: Unsupported copy destination I/O
number
Latest self- • This register stores an error code for the
diagnostic error error occurred in the other system with
code (the other hexadecimal.
system) • 'Latest self-diagnostic error code' (SD0) of
the other system is reflected.
Latest self- • An error time for the error occurred in the
diagnostic error other system is stored.
time (the other • Data configuration is the same as 'Latest
system) self-diagnostic error time' (SD1) to 'Latest
self-diagnostic error time' (SD7).
• The values in 'Latest self-diagnostic error
time' (SD1) to 'Latest self-diagnostic error
time' (SD7) of the other system are
reflected.
Information • A detailed information 1 category code for
category code 1 the error occurred in the other system is
(the other system) stored.
• Data configuration is the same as 'Detailed
information 1 information category'
(SD80).
• The value in 'Detailed information 1
information category' (SD80) of the other
system is reflected.
Detailed • A detailed information 1 for the error
information 1 (the occurred in the other system is stored.
other system) • Data configuration is the same as 'Detailed
information 1' (SD81 to SD111).
• The values in 'Detailed information 1'
(SD81 to SD111) of the other system are
reflected.
Set by (setting
timing)
S (System switching)
S (Status change)
S (Every END)
S (Every END)
S (Every END)
S (Every END)
Appendix 4 List of Special Register (SD) Areas
Effective system
Control Standby
system system
 
 
A
 
 
 
 
APPX
161