Chapter 1. Introduction
8 PACSystems* RX3i PROFINET IO-Scanner User Manual GFK-2737F
1.4.2 Operations of the PROFINET Scanner
The RX3i PROFINET Scanner (PNS) is the head-end unit responsible for monitoring and controlling I/O
modules installed in its RX3i I/O rack. All PROFINET communications are passed between the PROFINET I/O
Controller and the PNS. The PNS is one type of IO-Device the PROFINET I/O Controller expects to
encounter. Other third-party IO-Devices may also be present on the PROFINET network.
A PNS will normally be present on a PROFINET network controlled by an RX3i PROFINET Controller (PNC).
However, it is possible to use a PNS in conjunction with any qualified PROFINET I/O Controller.
The RX3i PNS performs the following operations:
Consumes PROFINET IO-Device configuration from the PROFINET IO-Controller over the PROFINET
network and applies it to its modules.
Scans input data from each module it manages and produces that data to the PROFINET
IO-Controller.
Consumes the output data that it receives from the PROFINET IO-Controller and applies it to each
module it manages.
GE Automation and Control offers the following types of PROFINET Scanners:
IC695PNS001: the RX3i PROFINET Scanner. It may control a sub-set of RX3i I/O modules located in
the same RX3i I/O rack. This product is discussed in detail in this manual.
IC695CEP001: a PROFINET Scanner which may control a sub-set of RX3i I/O modules in a remote
I/O drop. For product details, refer to the PACSystems RX3i CEP PROFINET Scanner User Manual,
GFK-2883.
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