Mitsubishi Electric MELSEC-Q Series User Manual page 222

APPENDICES
(1) Diagnostic Information
Number Name
SD0 Diagnostic errors Diagnosis error code
SD1
Clock time for Clock time for
SD2 diagnosis error diagnosis error
occurrence occurrence
SD3
Error information Error information
SD4
categories category code
App - 6
Special Register List
Meaning
• 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
Year (0 to 99)
• The day and hour that SD0 was updated is stored as BCD 2-digit code.
to
B15
Day (1 to 31)
• The minute and second that SD0 data was updated is stored as BCD 2-digit code.
B15 to
Minutes (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.
• The common information category codes store the following codes:
0 : No error
1 : Unit/module No./ PLC No./Base No.
2 : File name/Drive name
3 : Time (value set)
4 : Program error location
• 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
Explanation
(Example)
B8 B7 to B0
: October, 1995
Month (1 to 12)
H9510
(Example)
to
B8 B7 B0
: 10 p.m. on 25th
Hour (0 to 23)
H2510
(Example)
B8 B7 to B0
: 35 min. 48 sec.
Seconds (0 to 59)
(past the hour)
H3548
to
B15 B8 B7
Individual information Common information
category codes category codes
MELSEC-Q
to B0
Set by (When set)
S (Error)
S (Error)
S (Error)
App - 6