Basics Of I/O Allocation; How To Count The I/O Numbers; Concept Of I/O Number Allocation - Panasonic AFP7PSA1 User Manual

I/O Number Allocation

3.1 Basics of I/O Allocation

3.1.1 How to Count the I/O Numbers

 Counting and expression of the I/O numbers
Since I/O numbers are handled in units of 16 points, they are expressed as a combination of a
device type code and the lowest-digit of a decimal or hexadecimal number.
E.g. In the case of an external input, X0 to X9 and XA to XF are used.
<Decimal>
0, 1, 2, 3 ..... 9

3.1.2 Concept of I/O Number Allocation

 Examples of I/O Number Allocation
I/O numbers are determined by the status of unit attachment and the occupied I/O points
allocated to respective units.
 Starting word numbers of input/output units and intelligent units
 By default, the starting word number for the unit attached next to the CPU unit is set at "10",
and the I/O numbers start with X100 or Y100.
 The starting word number for each unit can be freely changed in the "FP7 Configuration"
menu of the tool software FPWIN GR7.
 How to count I/O numbers for units that have both inputs and outputs
In the case of a unit that has both inputs and outputs (e.g. mixed input/output units, intelligent
units), input numbers and output numbers start with the same value.
E.g. If input numbers for a mixed input/output unit are X100 to X11F, the unit's output
numbers are set at Y100 to Y11F.
 I/O numbers allocated to the CPU unit
A fixed area is allocated to the COM port and the ET-LAN port.
3-2
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1 2 7 F
<Hexadecimal>
0, 1, 2, 3 ..... 9, A, B ...F