Rockwell Automation 1756-L7x GuardLogix 5570 Controllers - Manual (Page 57)

Rockwell Automation Publication 1756-UM022A-EN-P - November 2012 57
Communicate over Networks Chapter 4
To use the 1756-DNB module to access standard data via the DeviceNet
network, you must use RSNetWorx for DeviceNet software to do the following:
• Create a configuration file for the network.
• Configure each standard device on the network.
• Configure the 1756-DNB.
• Add the standard I/O devices to the 1756-DNB scan list.
When you add the 1756-DNB module to the I/O Configuration of the
controller, the Logix Designer application automatically creates a set of standard
tags for the input, output, and status data of the network.
Serial Communication To operate the GuardLogix controller on a serial network, you need the
following:
• A workstation with a serial port
• RSLinx software to configure the serial communication driver
• The Logix Designer application to configure the serial port of the
controller
For the controller to communicate to a workstation or other device over the serial
network, you must follow these steps.
1. Configure the serial communication driver for the workstation.
2. Configure the serial port of the controller.
Use this mode For
DF1 Point-to-point Communication between the controller and one other DF1-protocol-compatible device.
This is the default System mode. This mode is typically used to program the controller
through its serial port.
DF1 Master Control of polling and message transmission between the master and slave nodes.
The master/slave network includes one controller configured as the master node and as
many as 254 slave nodes. Link slave nodes by using modems or line drivers.
A master/slave network can have node numbers from 0…254. Each node must have a
unique node address. Also, at least 2 nodes must exist to define your link as a network
(1 master and 1 slave station are the two nodes).
DF1 Slave A controller operating as a slave station in a master/slave serial communication network.
When there are multiple slave stations on the network, link slave stations by using
modems or line drivers to the master. When you have a single slave station on the
network, you do not need a modem to connect the slave station to the master. You can
configure the control parameters for no handshaking. You can connect 2…255 nodes to
one link. In DF1 Slave mode, a controller uses DF1 half-duplex protocol.
One node is designated as the master and it controls who has access to the link. All the
other nodes are slave stations and must wait for permission from the master before
transmitting.
DH-485 Communicating with other DH-485 devices multi-master, token passing network
allowing programming and peer-to-peer messaging.