618
Auxiliary Area Appendix C
A407 A40700
to
A40712
Too Many I/O
Points, Details
The 6 possible causes of the Too Many I/O Points
Error are listed below. The 3-digit binary value in
A40713 to A40715 indicates the cause of the error
(values 0 to 5 correspond to causes 1 to 6, below).
The 13-bit binary value in A40700 to A40712 indi-
cates the details: the excessive value or the dupli-
cated unit number.
CPU Unit operation will stop and the ERR/ALM indi-
cator on the front of the CPU Unit will light.
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 Racks will be written here when the
number of Expansion Racks exceeds the maxi-
mum.
(The relevant value will be written here (A40700 to
A40712) when the error occurs. These bits will be
cleared when the error is cleared.)
Cleared Cleared A40111,
A40713 to A40715
A40713
to
A40715
Too Many I/O
Points, Cause
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 A40700 to
A40712.
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
101: Too many Racks
111: Too many Units on a Rack
(These bits will be cleared when the error is cleared.)
Cleared Cleared ---
A408 A40800
to
A40807
Basic I/O Unit
Error, Slot
Number
When an error has occurred in a Basic I/O Unit,
A40212 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.)
Cleared Cleared A40212
A40808
to
A40815
Basic I/O Unit
Error, Rack
Number
When an error has occurred in a Basic I/O Unit,
A40212 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.)
Cleared Cleared A40212
A409 A40900
to
A40903
Expansion
Rack Number
Duplication
Flags
The corresponding flag will be turned ON when an
Expansion Rack’s starting word address was set
from a Programming Device 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.
1: Same words allocated to two different Racks or
Rack starting address exceeds CIO 0901.
0: No error
(The corresponding flag will be cleared when the
error is cleared.)
Cleared Cleared ---
A410 A41000
to
A41015
CPU Bus Unit
Number Dupli-
cation Flags
The Duplication Error Flag (A40113) and the corre-
sponding 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 indi-
cator on the front of the CPU Unit will light.
1: Duplication detected
0: No duplication
Cleared Cleared A40113
Address Name Function Status
after
mode
change
Status
at star-
tup
Write timing/
Related flags,
settings
Words Bits
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