62
3-6-34 Battery Low Flags
Bit A40204 is turned ON if the voltage of the CPU or Memory Card battery drops.
If the problem has occurred with the Memory Card battery, bit A42614 will be
turned ON, and if the problem has occurred with the CPU battery, bit A42615 will
be turned ON.
3-6-35 SYSMAC BUS Error Flag, Check Bits, and Master/Unit Numbers
Bit A40205 is turned ON when an error occurs during the transmission of data in
the SYSMAC BUS system. The number of the Master involved is written to word
A425, and information about the Unit(s) involved is written to words A470
through A477.
Bits A42500 through A42507 correspond to Masters #0 through #7, respective-
ly. When a error occurs, the bit corresponding to the number of the Master in-
volved is turned ON.
Words A470 through A477 are used to indicate which Unit is involved in the
error on Masters #0 through #7, respectively. The function of each bit is de-
scribed below. Refer to the
Optical
and
Wired Remote I/O System Manuals
for details.
Not used.
Bit 03 turns ON when an error has occurred in remote I/O.
If the content of bits 12 through 15 is B, an error has occurred in a Remote
I/O Master or Slave Unit, and the content of bits 08 through 11 will indicate
the number of the Master of the Remote I/O Subsystem involved. These
numbers are assigned to Masters in the order that they are mounted to the
CPU and Expansion Racks. If the error is in the Master, the value of bits 4 to
7 will be 8. If the error is in a Slave, bits 4 to 7 will contain the unit number of
the Slave where the error occurred.
If the content of bits 12 through 15 is other than B, an error has occurred in
an Optical I/O Unit, I/O Link Unit, or I/O Terminal. Here, bits 08 through 15
will provide the word address (#00 to #31) that has been set on the Unit.
When this Unit is an Optical I/O Unit, bit 04 will be ON if the Unit is assigned
leftmost bits (08 through 15), and OFF if it is assigned rightmost bits (00
through 07).
If there are errors in more than one Unit for a single Master, words A470
through A477 will contain error information for only the first one. Data for the
remaining Units will be stored in memory and can be accessed by turning ON
the Error Check Bit for that Master. Bits A00500 through A00507 are the Er-
ror Check Bits for Masters #0 through #7, respectively. Error Check Bits are
automatically turned OFF when data has been accessed. Write down the
data for the first error if required before using the Error Check Bit; previous
data will be cleared when data for the next error is displayed.
3-6-36 SYSMAC BUS/2 Error Flag and Master/Unit Numbers
Bit A40206 is turned ON when an error occurs during the transmission of data in
the SYSMAC BUS/2 System. The number of the Master involved is written to
word A424, and information about the Slave Unit(s) involved is written to words
A480 through A499.
Bits A42400 through A42403 are turned ON when the error involves Masters #0
through #3, respectively.
Bits 00 to 02
Bit 03 – Remote I/O Error
Flag
Bits 04 to 15
Error Check Bits
(A00500 to A00507)
Auxiliary Area Section 3-6
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