22 Rockwell Automation Publication 1756-PM004D-EN-P - September 2012
Chapter 1 Communicate with I/O Modules
This example uses the CPS instruction to copy an array of data that represent the
input devices of a DeviceNet network.
Buffer I/O
Local:0:I.Data stores the input data for the DeviceNet network that is connected to the 1756-DNB module in slot 0. To synchronize the inputs with the
application, the CPS instruction copies the input data to input_buffer.
– While the CPS instruction copies the data, no I/O updates can change the data.
– As the application executes, it uses for its inputs the input data in input_buffer.
42578
Synchronous Copy File
Source Local:0:I.Data[0]
Dest input_buffer[0]
Length 20
CPS
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