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MELSEC-Q
11 TROUBLESHOOTING
Special Register List (Continued)
Number Name Meaning Explanation
Set by
(When set)
Corresponding
ACPU
D9
Corresponding
CPU
SD207 Priorities 1 to 4 D9038
SD208 Priorities 5 to 8
D3039 format
change
SD209
LED display
priority
ranking
Priorities 9 to
10
• When error is generated, the LED display (flicker) is made according
to the error number setting priorities.
• The setting areas for priorities are as follows:
B15 B12
B11
B8 B7
B4
B3 B0
Priority 4 Priority 3 Priority 2 Priority 1
SD207
Priority 8 Priority 7 Priority 6 Priority 5
SD208
Priority 10 Priority 9
SD209
Default Value SD207=H4321
SD208=H8765
SD207=H00A9
• No display is made if "0" is set.
However, even if "0" has been set, information concerning CPU
module operation stop (including parameter settings) errors will be
indicated by the LEDs without conditions.
U
New
SD210 Clock data
Clock data
(year, month)
• The year (last two digits) and month are stored as BCD code at
SD210 as shown below:
B15 B12B11 B8 B7 B4 B3 B0
Year Month
Example :
July 1993
H9307
to
to
to to
D9025
SD211 Clock data
Clock data
(day, hour)
• The day and hour are stored as BCD code at SD211 as shown
below:
B15
B12B11
B8
B7 B4
B3 B0
Da
y
Hour
Example :
31st, 10 a.m.
H3110
to
to to to
D9026
SD212 Clock data
Clock data
(minute,
second)
• The minutes and seconds (after the hour) are stored as BCD code at
SD212 as shown below:
Example :
B15 B12B11 B8 B7 B4 B3 B0
to
to
to
to
Minute Second
35 min., 48 sec.
(after the hour)
H3548
S/U
(Request)
D9027
+Rem
Clock data
(higher digits of
year, day of
week)
• Stores the year (two digits) and the day of the week in SD213 in the
BCD code format as shown below.
B15 B12B11 B8 B7 B4 B3 B0
to to
to
to
Higher digits
of year (0 to 99)
Day of week
0
1
2
3
4
5
6
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Example :
Friday
H0005
S/U
(Request)
D9028
QCPU
Remote
SD213 Clock data
Clock data
(day of week)
• The day of the week is stored as BCD code at SD213 as shown
below:
B15 B12B11 B8 B7 B4 B3 B0
Always set "0"
Day of week
0
1
2
3
4
5
6
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Example :
Friday
H0005
to
to to to
S/U
(Request)
D9028 QnA