Mitsubishi Electric Q13UDVCPU - Page 583

581
APPENDICES
A
Appendix 3 List of Special Register Areas
*1 The information of the host CPU module is stored.
SD1588
Reason(s)
for system
switching
Reason(s) for
system
switching that
occurred in
host station
The reason(s) for system switching on the host system is
stored. The following values are stored corresponding to the
methods for system switching: This register is initialized with
zero (0) stored when the system is powered on from off or is
reset.
0: Initial value (control system has never 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: Control system switching instruction
17: System switching request from a programming tool
S (when
condition
occurs)
 QnPRH
SD1589
Reason(s)
for system
switching
failure
conditions
Reason(s) for
system
switching
failure No
• When a system switching has failed, a value
corresponding to the system switching failure cause is
stored.
0: System switching complete (default)
1: Tracking cable is not connected, tracking cable failure,
or internal circuit failure
2: H/W failure, power-off, reset, watchdog timer error on
the standby system
3: H/W failure, power-off, reset, WDT error on the control
system
4: Preparing tracking communication
5: Communication timeout
6: Stop error on the standby system (except for watchdog
timer error)
7: Operation differs between both systems (detected only
in the back up mode)
8: During memory copy from control system to standby
system
9: Performing program online change
10: Detecting a failure of network module on the standby
system
11: System is being switched
• The value is reset to "0" when host system is powered on.
• Zero is stored in this register upon completion of system
switching.
S (when
system is
switched)
 QnPRH
SD1590
Network
module
head
address,
which
requested
system
switching
Network
module head
address,
which
requested
system
switching
• When system switching is requested from a network
module in the host system, the bit corresponding to the
module that received the request turns on.
b1 to b11: Slot No.1 to slot No.11 (Slot No.0 (b0) is invalid
because the CPU module occupies two slots.)
• The system turns off the bit after the error is removed by a
user.
• For the number for modules where system switching is
requested from a network module in other system, refer to
SD1690.
S
(Error/Status
change)
New QnPRH
SD1595
Memory
copy target
I/O number
Memory copy
target I/O
number
• Before SM1595 is turned from off to on, the I/O No. of the
memory copy destination (Standby system CPU module:
3D1
H
) is stored.
UNewQnPRH
SD1596
Memory
copy status
Memory copy
status
• The execution result of the memory copy function is stored.
0: Memory copy is complete
4241
H
: Standby system power supply off
4242
H
: Tracking cable is disconnected or is damaged
4247
H
: Memory copy is being executed
4248
H
: Unsupported memory copy destination I/O number
S (Status
change)
New QnPRH
Number Name Meaning Explanation
Set by
(When Set)
Corresponding
ACPU
D9
Corresponding
CPU
b11 b1
b0