Chapter 4. Configuration
48 PACSystems* RX3i PROFINET IO-Scanner User Manual GFK-2737F
4.3 Assigning Device Names
After the PROFINET Scanner and other IO-Devices on the LAN have been entered into the configuration,
the Discovery and Configuration Protocol (DCP) tool must be used to assign a Device Name to each
IO-Device. The name of each device on the LAN must match the hardware configuration resident in the
PROFINET IO-Controller. This step is required before downloading the configuration from the PROFINET IO-
Controller; otherwise the PROFINET IO-Controller will be unable to connect to the devices on its network
and will be unable to deliver configuration data to those IO-Devices.
The DCP tool must be connected directly to the PROFINET IO-LAN. The DCP tool allows you to display an
identification pattern on an IO-Device. This can be helpful to distinguish devices apart when all are at
factory default settings.
The DCP tool supports issuing a reset command to an IO-Device. A reset clears the Device Name and sets
other non-volatile settings such as IP Address, subnet mask, and gateway mask to the factory defaults. A
Reset to Factory DCP command also clears all Ethernet port settings such as port disabling. This defaults
all ports to Enabled with Auto-negotiation on.
4.3.1 Transferring the Device Name with an SD Card
To allow replacement hardware to be commissioned without requiring a DCP Tool, the PROFINET Device
Name can be written to an SD Card and then transferred to replacement hardware via the SD Card.
To write the Device Name to an SD Card, the SD Card must be inserted into the PNS when the DCP Tool
assigns a Device Name to the PNS. An assignment of a Device Name using a DCP Tool writes that name to
both the SD Card and the non-volatile storage in the PNS. If the card is subsequently removed, the PNS
maintains its Device Name from its internal non-volatile storage memory.
If a PNS is powered up with an SD Card inserted that is programmed with a valid, non-blank Device Name,
that PNS will read the Device Name on the SD Card and update its non-volatile storage with that Device
Name.
An SD Card without a Device Name (such as a new, un-programmed SD Card) will not affect the PNS at
power-up. The PNS will power up and use the Device Name settings present in its internal non-volatile
storage.
If an SD Card is present on a PNS when a DCP Reset to Factory command is issued from the DCP Tool, the
Device Name on the SD Card will be erased. The DCP Reset to Factory command is a method to remove a
Device Name from an SD Card.
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