Mitsubishi Q00JCPU User Manual page 877

APPENDICES
(17)For redundant systems (Host system CPU information
Number Name Meaning
Operation mode
Hot start switch
SD1512 during CPU
power out time
module start up
4 LED states
Redundant • BACKUP
SD1585 system LED • CONTROL
status • SYSTEM A
• SYSTEM B
Reason(s) for
Reason(s) for
system switching
SD1588 system
that occurred in
switching
host station
*1: The information of the host CPU module is stored.
SD1510 to SD1599 are only valid for redundant systems.
They are all set to 0 for stand-alone systems.
TableApp.35 Special register
Explanation
• Shows the power out time (S) during the automatic switch from hot start
to initial start in the operation mode when the CPU module is started up.
The LED status for BACKUP, CONTROL, SYSTEM A, SYSTEM B is
stored in the following format:
b15 to b10b9 b8 b7 b6 b5 b4 b3 b2
0 0
SYSTEM B
0: Off
1: On
2: Flicker
SYSTEM A
0: Off
1: On
2: Flicker
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
(When Set)
to b0
BACKUP
0: Off
1: On (red) 5: On (orange-yellow)
2: Flicker(red) 6: Flicker
(orange-yellow)
3: On(green)
4: Flicker(green)
CONTROL
0: Off
1: On
condition occurs)
Appendix 2 Special Register List
*1
)
Corres-
Set by ponding Corresponding
ACPU CPU
D9
S (Initial) New Q4AR
S (status
New
change)
QnPRH
S (when
App
9
10
11
12
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