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Auxiliary Area
Name
Too Many I/O Points, Details
Too Many I/O Points, Cause
I/O Bus Error Flag
(Fatal error)
I/O Bus Error Slot Number
I/O Bus Error Rack Number
Duplication Error Flag
(Fatal error)
I/O Table Creation Error Infor-
mation
■
CPU Bus Unit Information
Name
CPU Bus Unit Number Dupli-
cation Flags
CPU Bus Unit Error, Unit
Number Flags
CPU Bus Unit Setting Error,
Unit Number Flags
CPU Bus Unit Setting Error
Flag
(Non-fatal error)
CPU Bus Unit Error Flag
(Non-fatal error)
296
Address
A40700 to
The 2 possible causes of the Too Many I/O Points Error are
A40712
listed below. The 3-digit binary value in A40713 to A40715
indicates the cause of the error. (The causes corresponding
to values 0 to 5 are listed below.)
• The number of I/O points will be written here when the
total number of I/O points set in the I/O Table exceeds the
maximum allowed for the CPU Unit.
• The number of Racks will be written here when the num-
ber of Expansion I/O Racks exceeds the maximum.
• Number of interrupt input points when there are more than
32 (Single CPU Systems only)
A40713 to
These three bits indicate the cause of the Too Many I/O
A40715
Points Error. (See A40700 to A40712.)
000 (0): Too many I/O points
001: Too many interrupt input points
101 (5): Too many Expansion Racks connected
A40114
ON when an error occurs in a data transfer between the
CPU Unit and a Unit mounted to a slot.
A40400 to
Contains the 8-bit binary slot number (00 to 08) where an
A40407
I/O Bus Error occurred in binary (00 to 08 hex).
A40408 to
Contains the 8-bit binary rack number (00 to 07) where an
A40415
I/O Bus Error occurred in binary (00 to 07 hex).
A40113
ON in the following cases:
Two CPU Bus Units have been assigned the same unit num-
ber.
Two Special I/O Units have been assigned the same unit
number.
Two Basic I/O Units have been allocated the same words.
The same rack number is set for more than one Expansion
Rack.
A261
Refer to information provided separately in this manual on
I/O table creation.
Address
A41000 to
The Duplication Error Flag (A40113) and the corresponding
A41015
flag in A410 will be turned ON when a CPU Bus Unit's unit
number has been duplicated.
Bits 00 to 15 correspond to unit numbers 0 to F.
A41700 to
When an error occurs in a data exchange between the CPU
A41715
Unit and a CPU Bus Unit, the CPU Bus Unit Error Flag
(A40207) and the corresponding flag in A417 are turned ON.
If the PLC Setup is set to turn ON the corresponding Error
Unit Number Flag when a Special Unit (Special I/O Unit or
CPU Bus Unit) is being replaced, the corresponding flag will
be turned ON when the Unit is being replaced.
If a duplexed CLK Unit is being replaced, the corresponding
flag will be turned ON during replacement.
Bits 00 to 15 correspond to unit numbers 0 to F.
A42700 to
When a CPU Bus Unit Setting Error occurs, A40203 and the
A42715
corresponding flag in A27 are turned ON.
Bits 00 to 15 correspond to unit numbers 0 to F.
A40203
ON when an installed CPU Bus Unit does not match the
CPU Bus Unit registered in the I/O table.
A40207
ON when an error occurs in a data exchange between the
CPU Unit and a CPU Bus Unit (including an error in the CPU
Bus Unit itself).
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