Troubleshoot ControlNet I/O

It is important to understand the difference between what is referred to as a ”ControlNet I/O configuration" and a configuration where

FactoryTalk Linx

is accessing data from a remote ControlNet device (for example, a

ControlLogix

controller via a 1756-CNB module).

In a ControlNet I/O configuration, a communications interface card (1784-PKTCS for the desktop, 2711P-RN15S, 2711P-RN15C for the

PanelView Plus

device) is physically attached to the host computer upon which the

FactoryTalk Linx

server is running. This ControlNet communications interface card is configured by

RSNetWorx for ControlNet

to exchange I/O data on the ControlNet network.

FactoryTalk Linx

, in turn, is configured to access the I/O data resident on that locally attached ControlNet communications interface.

In a ControlNet I/O configuration,

FactoryTalk Linx

itself is not generating requests that cause packets to be sent on the ControlNet network. It is accessing I/O data resident on a communications interface that is locally attached to the host computer.

If you are experiencing problems with ControlNet I/O, it is important to isolate the problem. Check the following in the order presented to isolate the source of the problem: