User manual

110 Publication 1783-UM003D-EN-E - December 2009
Chapter 4
CIP Network Connections
CIP is an object-oriented connection-based protocol that supports two basic
types of messaging: Explicit and Implicit (I/O) connections. A maximum of
32 connections is available. Both connection types must use the switch
password before any switch parameters can be written. The password is the
same one you entered during Express Setup.
.
Connection Description
Explicit messaging Explicit messaging connections provide generic, multi-purpose communication paths
between two devices. These connections are often referred to as messaging connections.
Explicit messages provide the typical request/response-oriented network communication.
Each request is typically directed at a different data item. Explicit messages can be used
for configuring, monitoring and troubleshooting the switch.
The Explicit Messaging interface is used by the RSLogix 5000 Add-on Profile for the switch.
I/O (implicit messaging) I/O connections provide dedicated, special purpose communication paths between a
producing application and one or more consuming applications. The application-specific
I/O data that moves through these connections is typically a fixed, cyclical structure.
The Switch supports two I/O connection choices.
• Input Only
• Exclusive Owner
Both connections are cyclic and adjustable from 300...5000 ms.
The Input Only connection contains a data structure with status information on the switch
in general and specific status on each of the ports. This connection is multicast and can be
shared by multiple controllers (connection originators).
The Exclusive Owner connection uses the same Input data structure as the Input Only
connection, but adds an Output data structure. The Output data contains a bit for each port
that allows you to enable or disable each port separately. While the Input data on this
connection can be shared (via multicast) by multiple controllers, only one controller may
own the Output data. If a second controller attempts to open this connection, the
connection will be rejected
IMPORTANT
Because the output data is sent cyclically by the controller, it
overrides any other attempt to enable or disable a port from
other software tools or visualization stations.