Mitsubishi Electric MELSEC iQ-R Series User Manual page 705

No. Name
SD1649 System switching cause
(when the systems are
successfully switched)
SD1650 System switching
instruction ID number
SD1653 Memory copy destination
I/O number
SD1654 Memory copy completion
status
SD1662 Tracking transfer data
receive completion wait
time
SD1664 Tracking transfer error
count
SD1667 Tracking transfer trigger
to
SD1670
Data stored Details
System switching cause System switching cause is stored.
(when the systems are • System switching cause is stored in SD1649 of both systems
successfully switched) when the system is switched.
• This register is initialized with 0 when the CPU module is
powered off and on or is reset.
• Either of the following is stored in this register.
0: Initial value (the control system never been switched)
1: Power-off, reset, hardware failure
2: Stop error
3: System switching request from a network module
16: System switching request by using the SP.CONTSW instruction
17: System switching request using an engineering tool
Note that 1 is not stored in SD1649 of the new standby system
when the system is switched by the power-off or reset of the CPU
module in the control system.
System switching • This register stores the argument (system switching instruction
instruction ID number ID number) of the executed SP.CONTSW instruction when the
system is switched by using the SP.CONTSW instruction. (The
argument is stored in SD1650 of both systems at the system
switching.)
• This register is valid only while 16 (System switching request by
using the SP.CONTSW instruction) is stored in SD1649.
• This register is updated only when the system is switched by the
SP.CONTSW instruction.
• The initial value is 0.
Memory copy destination • Before SM1653 is turned off and on, the I/O number of the
I/O number memory copy destination (CPU module in the standby system:
03D1H) is stored.
• The initial value is 0.
Memory copy completion This register stores the execution status of the memory copy.
status When the value other than 0 is stored, the memory copy is
completed with an error or cannot be executed.
0H: Completed normally
Other than 0H: Completed with an error or cannot be executed. For
details on the values stored when an error occurs, refer to the
error codes. ( Page 552 List of Error Codes)
Value to be added to the • Specify the value to be added to waiting time for completion of
tracking transfer data tracking data reception for the CPU module in the control
receive completion wait system.
time • Specify the value in units of ms. (Range is 0 to 2100ms.) If the
value out of the range is specified, the system recognized the
value as 2100ms.
• The initial value is 0ms.
Tracking transfer error • For the tracking transfer of the device/label data at each scan,
count the number is added (+1) when the tracking transfer cannot be
executed because of disconnection of the tracking cables,
power-off, reset, stop error of the CPU module in the standby
system, or error in the redundant function module.
• A counting cycle from 0 to 65535 to 0 is repeated.
Off: No trigger • When data is transferred based on the tracking transfer setting of
On: Trigger redundant settings, specify the target block as trigger.
■SD1667
b0 to b15: Block 1 to block 16
■SD1668
b0 to b15: Block 17 to block 32
■SD1669
b0 to b15: Block 33 to block 48
■SD1670
b0 to b15: Block 49 to block 64
• When "Transfer Automatically" is selected for the tracking block
No.1 auto transfer setting, b0 of SD1667 is turned on by the
system at power-on or when the CPU module is switched from
STOP to RUN. In other cases, turn on bit0 of SD1667 to b15 of
SD1670 by the user.
• Initial values for b0 of SD1667 to b15 of SD1670 are off (no
trigger)
Set by (setting
timing)
S (At system
switching)
S (At system
switching)
U
S (Status change)
U
S (upon error)
S (Initial)/U
Appendix 5 List of Special Register Areas
A
APPX
703