Allen-Bradley controllogix 1756-L55M12, Руководство пользователя

Страница: 28 / 142

Publication 1756-UM001G-EN-P - January 2007
28 Communicate over Networks
The 1756-CNB and 1756-CNBR communication modules support 64
CIP connections over a ControlNet network. However, for optimal
performance, only configure 48 connections for each module.
Additional Resources
For additional information, consult these publications:
•
ControlNet Modules in Logix5000 Control Systems User Manual,
publication CNET-UM001
•
Logix5000 Controllers Design Guidelines Reference Manual,
publication 1756-RM094
DeviceNet Network
Communication
The DeviceNet network uses the Common Industrial Protocol (CIP) to
provide the control, configuration, and data collection capabilities for
industrial devices. The DeviceNet network uses the proven Controller
Area Network (CAN) technology, which lowers installation costs and
decreases installation time and costly downtime.
A DeviceNet network provides access to the intelligence present in
your devices by letting you connect devices directly to plant-floor
controllers without having to hard wire each device into an I/O
module.
DeviceNet communication requires a 1756-DNB DeviceNet
communication module. The DeviceNet network uses the Common
Industrial Protocol (CIP) to provide the control, configuration, and
data collection capabilities for industrial devices.
Functions Required Module
•
Control I/O modules.
•
Require an adapter for distributed I/O on DeviceNet links.
•
Communicate with other DeviceNet devices (messages).
1756-DNB
•
Link an EtherNet/IP network to a DeviceNet network.
•
Require multiple networks.
1788-EN2DN
•
Link a ControlNet network to a DeviceNet network.
•
Require multiple networks.
1788-CN2DN