Mitsubishi Electric QJ71LP21 Reference Manual page 334

APPENDIX
Number Name Meaning
Diagnostic Diagnosis
SD0
errors error code
SD1
Clock time for
Clock time for
SD2 diagnosis
diagnosis error
error
occurrence
occurrence
SD3
Error Error
SD4 information information
categories category code
App - 30
Special Register List
(1) Diagnostic Information
• Error codes for errors found by diagnosis are stored as BIN data.
• Contents identical to latest fault history information.
• Year (last two digits) and month that SD0 data was updated is stored
as BCD 2-digit code.
B15 to B8 B7
Year (0 to 99) Month (1 to 12)
• The day and hour that SD0 was updated is stored as BCD 2-digit
code.
to
B15 B8 B7
Day (1 to 31) Hour (0 to 23)
• The minute and second that SD0 data was updated is stored as BCD
2-digit code.
B15 to B8 B7
Minutes (0 to 59) Seconds (0 to 59)
• Category codes which help indicate what type of information is being
stored in the common information areas (SD5 through SD15) and the
individual information areas (SD16 through SD26) are stored here.
to
B15
Individual information
category codes
• The common information category codes store the following codes:
0 : No error
1 : Unit/module No./ PLC No.
2 : File name/Drive name
3 : Time (value set)
4 : Program error location
5 : Switch cause (for Q4AR only)
: For a multiple PLC system, the module number or PLC
number is stored depending on the error that occurred.
(Refer to the corresponding error code for which number
has been stored.)
PLC No. 1: 1, PLC No. 2: 2, PLC No. 3: 3, PLC No. 4: 4
• The individual information category codes store the following codes:
0 : No error
1 : (Open)
2 : File name/Drive name
3 : Time (value actually measured)
4 : Program error location
5 : Parameter number
6 : Annunciator number
7 : Check instruction malfunction number
Explanation
(Example)
to B0
: October, 1995
H9510
(Example)
to
B0
: 10 p.m. on 25th
H2510
(Example)
to B0
: 35 min. 48 sec.
(past the hour)
H3548
B8 B7 to B0
Common information
category codes
MELSEC-Q
Set by Corresponding
Corresponding
(When ACPU
set) D9
D9008 format
S (Error)
change
S (Error) New
S (Error) New
App - 30
CPU
+Rem