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12
TROUBLESHOOTING
(2) System information
Number
Name
Status of
SD200
switch
SD201
LED status
Operating
SD203
status of CPU
12
12.7 Special Register List
- 91
Table12.22 Special register
Meaning
• The CPU switch status is stored in the following format.
b15
Status of CPU
switch
1): CPU switch status
• The following bit patterns are used to store the statuses of the
LEDs on the CPU module:
• 0 is off, 1 is on, and 2 is flashing.
b15
to
b12b11
Status of
CPU-LED
8)
7)
1): RUN
2): ERR.
3): USER
4): BAT.
• The CPU operating status is stored as indicated in the
following figure:
b15
to
b12 b11
1): Operating status
of CPU
Operating
status of CPU
2): STOP cause
Note stores the above-mentioned factors from the smallest
number in priority to the largest one. However, "4:error" is treated
as the highest priority.
Explanation
to
b4 b3
Empty
0: RUN
1: STOP
2: RESET
to
b8 b7
to
b4 b3
6)
5)
4)
3)
2)
5): Empty
6): Empty
7): TEST
8): Empty
to
b8 b7
to
b4 b3
2)
0:
RUN
2:
STOP
0:
Instruction in remote operation program
from RUN/STOP/RESET switch
1:
Remote contact
2:
Remote operation from GX Developer
4:
Error
5:
SAFETY MODE (wait-for-restart)
6:
"Write to PLC" was executed.
Set by
Corresponding
(When set)
to
b0
1)
S (Every END)
to
b0
S (Status
change)
1)
to
b0
1)
S (Every END)
CPU
QS
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Troubleshooting
