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Appendix 3 List Of Special Registers App - Mitsubishi Electric MELSEC-A Series User Manual

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APPENDICES
- - - - - - - - - - - - - - - - - - - - MELSEC-A
APPENDIX 3 List of Special Registers
The special registers are used for specific purposes in the A2C.
Table 3.1 shows the special registers and their purposes.
It is impossible to write data to those special registers not marked with *1 or
*2. (Read only)
(a) *1 Special registers: Reset (0) only.
(b) *2 Special relays: Data can be written.
Check their purposes when used in the sequence program.
Table 3.1 List of Special Registers
Stored
Releled
Releled
Number
Name
Explanation
SpecIal
SpecIal
Data
Relay.
Regl.ter.
• When fuse blow modules are detected. the lowest
number of detected units is stored in hexadecimal.
Fuse
(Example: When fuses of Y50 to 6F output modules
09100
09000
Fuse
blow
have blown, "50· is stored in hexadecimal) The
M9000
10
blown
module
module number monitored by the peripheral is
09107
number
hexadecimal.
(Cleared when all contents of 09100 to 09107
are reset to
0).
• If I/O module data is different from data entered
I/O
are detected when the power is turned on, the first
I/O
module
I/O number of the lowest number module among
module
verify
the detected modules stored in hexadecimal.
09116
09002
(Storing method is the same as that of 09000.)
M9001
10
verify
error
The module number monitored by the peripheral is
09123
error
module
number
hexadecimal.
• (Cleared when all contents of 09116 of 09123 are
reselto
0.)
AC
AC
• 1 is added each time input voltage becomes 80%
*1
DOWN
DOWN
or less of rating while the CPU unit is performing
M9005
09005
time
operation, and the value is stored in BIN code.
-
counter
count
Self-
Self-
• When error is found as a result of self-diagnosis,
*1
diegnoslic
diagnostic
error number is stored in BIN code.
M9008
-
09008
error
'error
number
• When one of Fe to 255 is turned on by [OUT F] or
F number
[SET F], the F number, which has been detected
Annun-
at which
earliest among the F numbers which have turned
09124
09009
ciator
external
on, is stored in BIN code.
M9009
10
detection
failure
• 09009
cen be cleered by [RSTF] or [REOR]
09132
occurred
instruction. If another F number has been
detected, the clearing of 09009 causes the next
number to be stored in 09009.
Slep
• When operation error has occurred during
number
execution of application instruction, the step
09010
Error
at which
number, at which the error has occurred, is stored
M9010
-
slep
operation
in BIN code. Thereafter, each time operation error
error has
occurs, the contents of 09010 are renewed.
occurred
APP-10

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