Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual page 881

No. Name
SD1754 Cause of control
system start-up
SD1755 Tracking cable
connection status
Data stored Details
Cause of start-up as This register stores the cause that one of the redundant system has
the control system 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.
b15 ... b12
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 (RUNSTOPRUN),
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
Tracking cable • This register stores the tracking cable connection status when an
connection status 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.
b3 ... b0
Appendix 5 List of Special Register Areas
Set by CPU
(setting
timing)
S (Status RnP
change) RnPSF
S (Initial/every RnP
END) RnPSF
A
APPX
879