4-9
4 CPU Unit Initialization
CJ2 CPU Unit Software User’s Manual
4-3 Creating I/O Tables
4
4-3-1 I/O Tables
4-3 Creating I/O Tables
You must create I/O tables only in the following cases. I/O tables are created by using the CX-Program-
mer.
• To check for incorrect connections
•To reserve words
It is not necessary to create I/O tables if checking for incorrect connection is not required and automatic
allocation is acceptable.
The type and location of Units connected to the CPU Unit are registered in the I/O tables. If I/O tables
are created, the system will check if the types and locations of the Units actually connected to the CPU
agree with the data registered in the I/O tables when the CPU Unit is tuned ON.
The I/O tables can be made based on the actually connected Units when the CX-Programmer is online,
or they can be manually set when the CX-Programmer is offline and then transferred to the CPU Unit.
The CPU Unit automatically verifies with the connected Units (actual I/O tables) mounted to it according
to this data.
• If there is a mismatch, an I/O setting error will occur, and operation will not start.
4-3-1 I/O Tables
00 01 02
00 0000 CJ1W-ID201
01 2000 CJ1W-AD041-V1
CJ2H-CPU68-EIP
02 1500 CJ1W-CLK21-V1
03 0001
04 0001
CX-Programmer
I/O Tables
CPU Unit
CJ1W-ID201
Basic I/O Unit
CJ1W-AD041-V1
Special I/O Unit
CJ1W-CLK21-V1
CPU Bus Unit
Open slot
Open slot
Units
Unit type
I/O memory
area address
Location
(slot number)
I/O tables can be made using the
CX-Programmer online for the actual
Units or edited offline as desired and
then transferred to the CPU Unit.
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