APPX
Appendix 5 List of Special Register Areas
705
A
SD1754 Cause of control system
start-up
Cause of start-up as the
control system
This register stores the cause that one of the redundant system has
been started up as the control system.
• This register is initialized with 0 when the CPU module is
powered off and on or is reset.
b0 to b3: Cause of start-up by specific operations to start up the
system as the control system
0: No specific operation, 1: Switch operation
(RUNSTOPRUN), 2: Online operation, 4: Contact input (X)
b12 to b15: Information when the system is started up as the
control system
0: Before start-up, 1: Start-up as the control system by starting up
the other system, 2: Start-up as the control system by the
specific operation
S (Status change)
SD1755 Tracking cable connection
status
Tracking cable connection
status
• This register stores the tracking cable connection status when an
initial processing (including when the system is determined while
waiting for the other system starts up) or an END processing is
performed.
0H: Normal
12H: Cable disconnection of the OUT side
13H: Cable insertion error of the OUT side
14H: Communications on the OUT side being established
21H: Cable disconnection of the IN side
22H: Cable disconnection of the IN or OUT side
23H: Cable disconnection of the IN side or cable insertion error of
the OUT side
24H: Cable disconnection of the IN side or communications on the
OUT side being established
31H: Cable insertion error of the IN side
32H: Cable insertion error of the IN side or cable disconnection of
the OUT side
33H: Cable insertion error of the IN or OUT side
34H: Cable insertion error of the IN side or communications on the
OUT side being established
41H: Communications on the IN side being established
42H: Communications on the IN side being established or cable
disconnection of the OUT side
43H: Communications on the IN side being established or cable
insertion error of the OUT side
44H: Communications on the IN or OUT side being established
• The tracking cable status can be checked with this register when
bit of SD1648 turns on.
S (Initial/every
END)
SD1756 Module information on
wait timeout for receiving
cyclic data after system
switching
*1
Timeout occurrence
status (bit pattern)
Off: No timeout
On: Timeout
• When the receipt of the cyclic data after system switching is not
completed within the cyclic data receipt waiting time
*2
while the
setting to wait cyclic data receive after system switching is
enabled, this register turns on the bit corresponding to the slot on
the main base unit on which a timeout has occurred. (The bits of
the positions where no modules are mounted turn off.)
• When a timeout does not occur, this register turns off the
corresponding bit.
b0 to b11: Slot No.0 to slot No.11
S (At system
switching)
No. Name Data stored Details Set by (setting
timing)
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