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(15) For redundant systems (Host system CPU information
SD1510 to SD1599 are only valid for redundant systems.
They are all set to 0 for stand-alone systems.
Number
Name
Meaning
4 LED states
Redundant
• BACKUP
SD1585
system LED
• CONTROL
status
• SYSTEM A
• SYSTEM B
Reason(s) for
Reason(s) for
system switching
SD1588
system switch-
that occurred in
ing
host station
Reason(s) for
Reason(s) for
system
SD1589
system switching
switching failure
failure No.
conditions
Network module
Network module
head address,
head address,
SD1590
which requested
which requested
system
system switching
switching
Memory copy
Memory copy
SD1595
target I/O
target I/O number
number
Memory copy
Memory copy
SD1596
status
status
*1: The information of the host CPU module is stored.
Table12.34 Special register
Explanation
The LED status for BACKUP, CONTROL, SYSTEM A, SYSTEM B is
stored in the following format:
b15
b10b9
b8
b7
b6
b5
b4
b3
b2
to
b0
to
0
0
BACKUP
0: Off
SYSTEM B
1: On (red)
0: Off
2:
1: On
2: Flicker
3: On(green)
4: Flicker(green)
SYSTEM A
0: Off
CONTROL
1: On
0: Off
2: Flicker
1: On
Stores the reason(s) for system switching on the host system.
The following values are stored corresponding to the methods for system
switching:
Initialized to 0 when the power supply is switched off and then on or the
RESET switch is set to the RESET position and then to the neutral
position.
0: Initial value (control system has not been switched)
1: Power off, Reset, H/W failure, WDT error,
2: CPU stop error (except WDT)
3: System switching request from network module
16: System switching dedicated instruction
17: System switching request from GX Developer
• Stores the reason(s) for system switching failure.
0: System switching normal (default)
1: Tracking cable is not connected , tracking cable error, FPGA circuit
failure.
2: H/W failure, power-OFF, Reset, WDT error on the standby system
3: H/W failure, power-OFF, Reset, WDT error on the Control system
4: Tracking data transfer initialization
5: Communication timeout
6: Serious error(except WDT error) on the Standby system
7: There is difference between both systems
(detected as Backup mode only)
8: During memory copy from control system to standby system
9: During online program change
10: During detection of intelligent function module failure on the standby
system
11: System switching being executed
• Resets to "0" when host system is powered on.
• Resets to "0" once system has been switched successfully.
• Stores head address of network module which a system switch request
was initiated.
• Turns off automatically by system, after network error is reset by user.
b15
to
b11
to
b1 b0
0
SD1590
0/1
0/1
0
Module 0:
Module 1:
Module11:
• Please refer to SD1690 which stores the corresponding head address of
network module on other system.
• Stores the memory copy target I/O No.(Standby system CPU module:
3D1H) of before SM1595 is turned from OFF to ON.
• Stores the execution result of Memory copy function.
0
: Memory copy successfully completed
4241
: Standby system power supply off
H
4242
: Tracking cable is disconnected or is damaged
H
4247
: Memory copy function is being executed
H
4248
: Unsupported memory copy destination I/O Number
H
CHAPTER12 PECIAL RELAY LIST AND SPECIAL REGISTER LIST
*1
)
Set by
(When Set)
S (status
5: On (orange-yellow)
change)
Flicker(red)
6: Flicker
(orange-yellow)
S (when
condition occurs)
S(when system
is switched)
Each bit
0:OFF
1:ON
CPU module is invalid
S (Error/Status
as it is 2-slot model.
change)
Module on the right
side of the CPU module
to
Module at the
rightmost end of the
12-slot base (Q312B)
U
S (Status
change)
Corres-
ponding
Corresponding
ACPU
CPU
D9
New
QnPRH
QnPRH
New
QnPRH
New
New
12 - 74
1
2
3
12
6
7
8
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