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APPX
Appendix 5  List of Special Register Areas
Diagnostic information
The following is the list of special register areas relating to the diagnostic information.
No. Name Data stored Details Set by 
(setting 
timing)
CPU
SD0 Latest self 
diagnostics error 
code
Latest self 
diagnostics error 
code
Error codes are stored in a hexadecimal value when the diagnostics detects 
an error.
S (Error) ALL
SD1 Latest self-
diagnostics error 
time
Latest self-
diagnostics error 
time
The year value (four digits) of the date/time when SD0 data was updated is 
stored as a BIN code.
S (Error) ALL
SD2 The month value of the date/time when SD0 data was updated is stored as a 
BIN code.
ALL
SD3 The day value of the date/time when SD0 data was updated is stored as a 
BIN code.
ALL
SD4 The hour value of the date/time when SD0 data was updated is stored as a 
BIN code.
ALL
SD5 The minute value of the date/time when SD0 data was updated is stored as a 
BIN code.
ALL
SD6 The second value of the date/time when SD0 data was updated is stored as 
a BIN code.
ALL
SD7 The day of the week value of the date/time when SD0 data was updated is 
stored as a BIN code. (0: Sun, 1: Mon, 2: Tue, 3: Wed, 4: Thu, 5: Fri, 6: Sat)
ALL
SD10 Self-diagnostic 
error number
Self-diagnostic 
error number 1
The maximum of 16 types of error codes are stored into SD10 onwards when 
the diagnostics detects an error (The same error code as one already stored 
in SD10 onwards is not stored). The 17th error code onwards are not stored. 
Also error codes are not stored when 16 types of error codes have already 
been stored into SD10 to SD25.
S (Error) ALL
SD11 Self-diagnostic 
error number 2
ALL
SD12 Self-diagnostic 
error number 3
ALL
SD13 Self-diagnostic 
error number 4
ALL
SD14 Self-diagnostic 
error number 5
ALL
SD15 Self-diagnostic 
error number 6
ALL
SD16 Self-diagnostic 
error number 7
ALL
SD17 Self-diagnostic 
error number 8
ALL
SD18 Self-diagnostic 
error number 9
ALL
SD19 Self-diagnostic 
error number 10
ALL
SD20 Self-diagnostic 
error number 11
ALL
SD21 Self-diagnostic 
error number 12
ALL
SD22 Self-diagnostic 
error number 13
ALL
SD23 Self-diagnostic 
error number 14
ALL
SD24 Self-diagnostic 
error number 15
ALL
SD25 Self-diagnostic 
error number 16
ALL
SD49 Error detection 
invalidation 
setting
Error detection 
invalidation 
setting
Specify a function for which detection of continuation errors is invalidated. 
(On: Invalidate (do not detect an error), Off: Do not invalidate (detect an 
error))
b0: Built-in Ethernet port communication error
URn
*1
RnP
*1