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installed correctly. The rack/slot number of the Unit involved is written to word
A404.
Bits A40400 through A40407 contain the slot number, in BCD, of the I/O Unit
where the error occurred. If the error did not occur with an I/O Unit, then these
bits contain #0F. Bits A40408 through A40415 contain the rack number, in BCD,
of the Rack where the error occurred.
If the error occurred because of a terminator setting, word A404 will contain
#0E0F for line 0 (IOC right connector), or #0F0F for line 1 (IOC left connector).
3-6-34 Memory Error Flag
Bit A40115 is turned ON when an error occurs in memory. The memory area in-
volved is written to word A403.
3-6-35 Duplex Bus Error Flag
Bit A40201 is turned ON when an error is detected in the duplex bus error check.
3-6-36 Power Interruption Flag
Bit A40202 is turned ON when power is momentarily interrupted if a momentary
power interruption is set as an error in the PC Setup (see “Error on power off” in
the PC Setup). The time and date of the most recent power interruption is written
to words A012 and A013, and the number of power interruptions is written to
word A014.
3-6-37 CPU Bus Unit Setting Error Flag and Unit Number
Bit A40203 is turned ON when the CPU Bus Units actually installed differ from
the Units registered in the I/O table. The unit number of the CPU Bus Unit in-
volved is written to word A427.
Bits A42700 through A42715 correspond to CPU Bus Units #0 through #15, re-
spectively. When a error occurs, the bit corresponding to the unit number of the
CPU Bus Unit involved is turned ON.
3-6-38 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.
3-6-39 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 described be-
low. 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 num-
Bits 00 to 02
Bit 03 – Remote I/O Error
Flag
Bits 04 to 15
Auxiliary Area
Section 3-6
Summary of Contents for CVM1D
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