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6-2 Section Details
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6-2 Details
Explanations of the I/O memory areas in the Customizable Counter Unit are
given in this section.
6-2-1 Input and Output Areas
The bits in the Input and Output Areas are allocated to the input and output termi-
nals on the Customizable Counter Unit.
Note 1. Inputs bits cannot be used with the OUT, OUT NOT, SET, and RSET instruc-
tions.
2. Do not use the same output bit for more than one of the following instruc-
tions: OUT, OUT NOT, SET, or RSET instructions. Doing so may result in
incorrect execution of the program.
Customizable Counter Unit’s Built-in Inputs: 12 Points (IR 000)
Out of the 12 inputs that are built into the Customizable Counter Unit, 4 inputs
(IR 00000 to IR 00003) can also be used as interrupt inputs.
Address Bits Function
IR 000 00 to 03 These bits can be used as either normal inputs or interrupt inputs (in either
Input Interrupt Mode or Counter Mode). (Set in the Unit Setup Area.)
04 to 11 These bits can be used as normal inputs.
12 to 15 These bits cannot be used as work bits.
Customizable Counter Unit’s Built-in Outputs: 8 Points (IR 001)
Address Bits Function
IR 001
00 to 07 These bits are used as normal outputs.
08 to 15 These bits can be used as work bits.
6-2-2 SR Area
SR bits are used for specific functions related to general operation of the Custo-
mizable Counter Unit. For details on the functions of individual bits, refer to 6-3
SR Area.
6-2-3 TR Area
TR bits temporarily store the ON/OFF status of branch points of instruction
blocks. They are useful when programming in mnemonic code if there are output
branches in the program that cannot be input without storing the execution
conditions. When programming is performed using a ladder diagram, proces-
sing is performed internally and so no consideration of TR bits is required.
The same TR bit cannot be used more than once in the same instruction block.
They can, however, be used as many times as required in different instruction
blocks. The ON/OFF status of TR bits cannot be monitored from a Programming
Device.
6-2-4 AR Area
AR bits are used for specific functions related to the operation of the Customiz-
able Counter Unit’s special I/O. For details on the functions of individual bits,
refer to 6-4 AR Area.