Endian - Omron PROFINET NX-PNC202 User Manual

9 Setting Up the PROFINET Coupler Unit
IO Allocation Display
The IO allocation display area includes the following information.
Item
Input Tab
Output Tab
Position
Bit Offset
Size
IO Data Size
Output to File
Padding
Padding is sometimes required in the IO allocation to fill remaining bits within an incomplete byte of
data. This is done automatically to ensure whole bytes are used for data exchange.
9-6-3

Endian

The PROFINET Coupler Unit only supports little endian. It is recommended to select an IO Control-
ler/PLC which supports function blocks to swap from little-endian to big-endian. Please refer to third
party IO Controller Operation manual how to use the swap function blocks.
9 - 30
The overview of the input IO allocation.
The overview of the output IO allocation.
The IO Device Terminal Unit mounting location with corresponding Unit number.
Refer to 9-6-1 Basic IO Mapping on page 9-27 for more information.
The consecutive order of bits assigned based on the size of each port accounting for any
necessary padding (see below for padding details).
Each item in the port area has a specific data size and this determines the bit offset and the
data input/output total size.
The summary of the input/output bytes required to accommodate all port items previously
configured.
Clicking Output to File will generate a zip file that includes an .xsl and .xml file.
Opening the .xml file in a browser will display a table overview of the IO allocation.
Description
NX-series PROFINET Coupler Unit User's Manual (W623)