Rockwell Automation 1783-BMxxx Stratix 5700 Ethernet Managed Switches User Manual - Manual (Page 188)

188 Rockwell Automation Publication 1783-UM004E-EN-P - June 2014
Chapter 5 Manage the Switch via the Studio 5000 Environment
EtherNet/IP CIP Interface Stratix 5700 switches contain an EtherNet/IP network interface. The
EtherNet/IP network is an industrial automation network specification
maintained by the Open DeviceNet Vendor Association (ODVA). It uses the
Common Industrial Protocol (CIP) for its application layer and TCP/UDP/IP
for its transport and network layers. This interface is accessible via any of the
switch's Ethernet ports by using the IP address of the switch.
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
enter during Express Setup.
.
Table 27 - CIP Network Connections
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 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 Logix Designer application.
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 lets you enable or disable each port separately. While the
Input data on this connection can be shared (via multicast) by multiple controllers, only one controller can own the
Output data. If a second controller attempts to open this connection, the connection is 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.