Mitsubishi MELSEC-A Series Programming Manual page 422

APPENDICES
Number Name
SUM instruction
D9003
detection bits
*1 MINI link master
D9004 module error
*1 AC DOWN
D9005 counter
D9006 Battery low
*1 Shelf-diagnostic
D9008 error
Annunciator
D9009
detection
Table 1.4 Special Register List (Continue)
Description
The number of bits • The number of bits detected by execution of the SUM
detected by SUM instruction are stored. in BIN code and updated every
instruction detection. execution thereafter.
• Error status of the MINI (S3) link detected on loaded
MINI (S3) link module is stored.
b15
8 7 6 5 4 3 2 1
Data communication
between the PLC CPU
and MINI (S3) link
module is disabled.
Error detection status
• 1 is added each time input voltage becomes 85% or
AC DOWN count less of rating while the CPU unit is performing
operation, and the value is stored in BIN code.
• Bits which correspond to CPU of which battery is low
are turned on in D9006, as shown below.
B15
Indicates the CPU
0
module of which
battery voltage is low.
0: Normal
1: Battery low
Self-diagnostic error • When error is found as a result of self-diagnosis, error
number number is stored in BIN code.
• When one of F0 to 255 is turned on by
SET F
earliest among the F numbers which have turned on, is
stored in BIN code.
• D9009 can be cleared by
If another F number has been detected, the clearing of
D9009 causes the next number to be stored in D9009.
F number at which
• When one of F0 to 255 is turned on by
external failure has
SET F
occurred
earliest among the F numbers which have turned on, is
stored in BIN code.
• D9009 can be cleared by executing
instruction or moving INDICATOR RESET switch on
CPU front to ON position. If another F number has
been detected, the clearing of D9009 causes the nest
number to be stored in D9009.
Details
to b8 b7
8 7 6 5 4 3 2 1
Bits which correspond
to the signals of MINI
(S3) link module,
shown below, are
turned on as the signals
are turned on.
Hardware error
(X0/X20)
MINI(S3) link error
detection (X6/X26)
MINI(S3) link
communication error
(X7/X27)
B3 B2
0
, the F number, which has been detected
or
RST F
, the F number, which has been detected
APP - 17
Applicable CPU
Dedicated to
—
A0J2H.
to b0
Usable with
AnA, A2AS,
—
AnA board and
AnU.
Usable with all
types of CPUs.
B1 B0
Dedicated to
—
A3V.
CPU A
CPU B
CPU C
Usable with all
types of CPUs.
or
OUT F
Unusable with
A3, A3N, A3A,
A73 and A3N
instruction.
LEDR
board.
or
OUT F
Usable with A3,
or — A3N, A3A, A73
RST F LEDR
and A3N board.