89
Details
Section 6-2
4.
With the Customizable Counter Unit, there is no function (e.g., such as an
IOM Hold Bit) for holding the bit status in the cleared areas above when the
operating mode is changed or the power supply is turned ON.
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
terminals on the Customizable Counter Unit.
Note
1.
Inputs bits cannot be used with the OUT, OUT NOT, SET, and RSET in-
structions.
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.
Customizable Counter Unit’s Built-in Outputs: 8 Points (IR 001)
6-2-2
SR Area
SR bits are used for specific functions related to general operation of the Cus-
tomizable 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 out-
put branches in the program that cannot be input without storing the execution
conditions. When programming is performed using a ladder diagram, process-
ing 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.
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.
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.
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