User`s manual
App - 12
Appendix 2 Special Register List
APPENDICES
(2) System information
TableApp.10 Special register
Number Name Meaning Explanation
Set by
(When set)
Corresponding
CPU
SD150
I/O module
verify error
Bit pattern, in
units of 16
points,
indicating the
modules with
verify errors.
0: No I/O verify
errors
1: I/O verify
error present
• When I/O modules, of which data are different from those
entered at power-on, have been detected, the I/O module
numbers (in units of 16 points) are entered in bit pattern.
(Preset I/O module numbers set in parmeters when parameter
setting has been performed.)
• Not cleared even if the blown fuse is replaced with a new one.
This flag is cleared by error resetting operation.
S (Error) QS
SD151
SD152
SD153
TableApp.12 Special register
Number Name Meaning Explanation
Set by
(When set)
Corresponding
CPU
SD200
Status of
switch
Status of CPU
switch
• The CPU switch status is stored in the following format.
S (Every END)
QS
SD201 LED status
Status of
CPU-LED
• 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 flicker.
1): RUN 5): Empty
2): ERR. 6): Empty
3): USER 7): TEST
4): BAT. 8): Empty
S (Status
change)
SD203
Operating
status of CPU
Operating
status of CPU
• The CPU operating status is stored as indicated in the
following figure:
S (Every END)
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
000 000 0000000
SD150
00 0 00000000SD151 00
0 0 0000 000SD153 0000
Indicates an I/O module verify error
00
00
00
1
()
X Y
3E0
1
()
X Y
0
1
()
X Y
190
b15 b4 b3 b0
1)
Empty
to
to
1): CPU switch status
0: RUN
1: STOP
2: RESET
b15 b12b11 b8 b7 b4b3 b0
1)2)4) 3)5)6)8) 7)
to tototo
b15 b12
b11
b8 b7 b4 b3 b0
1)
to to to to
2)
1): Operating status
of CPU
0:
2:
2): STOP cause 0:
1:
2:
4:
RUN
STOP
Instruction in remote operation program
from RUN/STOP/RESET switch
Remote contact
Remote operation from GX Developer/
serial communication, etc.
Error
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.