46 Rockwell Automation Publication 1789-UM002K-EN-P - January 2015
Chapter 3 Communicate with Devices on an Ethernet Network
If UDP is disabled on a local computer, you can browse the ControlNet and
EtherNet/IP networks and serial devices to see configured devices, as long as the
appropriate module is installed in the virtual chassis on the local computer.
To be able to browse DeviceNet networks, RSLinx Gateway functionality (and
therefore UDP) must be enabled on the computer that hosts the DeviceNet
communication card.
Enabling the UDP option
Enabling the UDP option lets the RSLinx Gateway functionality operate as
expected. Installing a SoftLogix 5800 EtherNet/IP module into a system with the
UDP option enabled and RSLinx Gateway functionality enabled, causes the
SoftLogix EtherNet/IP module to display a red X in the chassis monitor. This
does not affect the operation of the RSLinx software. It does prohibit the
SoftLogix controller from sending and receiving messages and controlling
I/O modules via an EtherNet/IP network.
Adding multiple Ethernet modules does not affect controller operation when
UDP is enabled. Checking the Enable UDP box applies to all Ethernet ports on
the computer; RSLinx Gateway software will use all of the Ethernet ports.
Enable the UDP option and the RSLinx Gateway functionality when you need
the computer to configure or commission ControlNet and DeviceNet networks
and devices. With the UDP option enabled, you have this functionality and loss
of functionality in the computer where the controller resides:
• You must browse from the 1784-PCIDS driver in RSLinx software to
browse a DeviceNet network.
• You can remotely browse the ControlNet network if there is a
ControlNet module in the virtual chassis.
• You can browse over the serial port of the computer if there is a
SoftLogix controller in the virtual chassis.
• You can remotely program the SoftLogix controller because the local
computer supports a remote connection to the SoftLogix controller over
an Ethernet network.
• If there is an EtherNet/IP module in the virtual chassis, it will not function
as expected. You cannot control I/O or send messages.
• You can remotely program the SoftLogix controller because the local
computer supports a remote connection to the SoftLogix controller over
an Ethernet network.
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