Omron CJ2 CPU - REV 10-2010 User Manual page 626

Appendices
Address
Name
Words Bits
A407 A407.00 Too Many I/O
to Points, Details 1
A407.12
A407.13 Too Many I/O
to Points, Details 2
A407.15
A408 A408.00 Basic I/O Unit
to Error, Slot Num-
A408.07 ber
A408.08 Basic I/O Unit
to Error, Rack Num-
A408.15 ber
A409 A409.00 Expansion Rack
to Number Duplica-
A409.03 tion Flags
A410 A410.00 CPU Bus Unit
to Number Duplica-
A410.15 tion Flags
A-142
Function
When any of the following values overflows or an duplication error
occurs, the corresponding value will be stored as binary data. The
operation of the CPU Unit will stop. The ERR/ALM/ indicator on
the front of the CPU Unit will light. For information on the reason
the error occurred, refer to Too Many I/O Points, Details 2
(A407.13 to A407.15).
1. The number of I/O points will be written here when the total
number of I/O points set in the I/O Table (excluding Slave
Racks) exceed the maximum allowed for the CPU Unit.
2. The number of interrupt input points when the number of
interrupt input points exceeds 32.
3. The number of Racks will be written here when the number of
Expansion Racks exceeds the maximum.
The relevant value will be written here (A407.00 to A407.12) when
the error occurs. These bits will be cleared when the error is
cleared.
The 3-digit binary value of these bits indicates the cause of the
Too Many I/O Points Error and shows the meaning of the value
written to bits A407.00 to A407.12.
Values of 000 to 101 (0 to 5) correspond to causes 1 through 6
described in "Too Many I/O Points, Cause 1," above.
000: Too many I/O total
001: Too many interrupt input points
100: Too many Pulse I/O Modules
101: Too many Racks
111: Too many Units on a Rack
These bits will be cleared when the error is cleared.
When an error has occurred in a Basic I/O Unit, A402.12 will be
turned ON and the slot number where the error occurred will be
written here in binary.
The CPU Unit will continue operating and the ERR/ALM indicator
on the front of the CPU Unit will flash.
00 to 09 hexadecimal
(Slots 0 to 9)
These bits will be cleared when the error is cleared.
When an error has occurred in a Basic I/O Unit, A402.12 will be
turned ON and the Rack number where the error occurred will be
written here in binary.
The CPU Unit will continue operating and the ERR/ALM indicator
on the front of the CPU Unit will flash.
00 to 03 hexadecimal
(Racks 0 to 3)
These bits will be cleared when the error is cleared.
The corresponding flag will be turned ON when an Expansion
Rack's starting word address was set from the CX-Programmer
and two Racks have overlapping word allocations or a Rack's
starting address exceeds CIO 0901. Bits 00 to 03 correspond to
Racks 0 to 3.
ON: Same words allocated to two different Racks or Rack starting
address exceeds CIO 0901.
OFF: No error
The corresponding flag will be cleared when the error is cleared.
The Duplication Error Flag (A401.13) and the corresponding flag
in A410 will be turned ON when an CPU Bus Unit's unit number
has been duplicated. Bits 00 to 15 correspond to unit numbers 0
to F.
CPU Unit operation will stop and the ERR/ALM indicator on the
front of the CPU Unit will light.
ON: Duplication detected
OFF: No duplication
Status Write timing/
Status at
after mode Related flags, set-
startup
change tings
Cleared Cleared A401.11, A407.13
to A407.15
Cleared Cleared ---
Cleared Cleared A402.12
Cleared Cleared A402.12
Cleared Cleared ---
Cleared Cleared A401.13
CJ2 CPU Unit Software User's Manual