Rockwell Automation 1789-L10_L30_L60 SoftLogix 5800 System User Manual - Manual (Page 84)

84 Rockwell Automation Publication 1789-UM002J-EN-P - December 2012
Chapter 4 Communicate with Serial Devices
4. Click the System Protocol tab and specify the appropriate settings.
Specify System Protocol Characteristics
These are the available system modes and their characteristics.
Table 4 - System Protocol Tab Descriptions
Field Mode
Protocol 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).
See page 88 .
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.
See page 86 .
DF1 Radio Modem - Check the Enable Store and Forward check box if you want to enable the store and forward functionality. When enabled,
the destination address of any received message is compared to the Store and Forward tag table. If there is a match, the message is then
forwarded (re-broadcasted) out the port.
From the Store and Forward Tag pull-down menu, choose an integer (INT[16]) tag.
Each bit represents a station address. If this controller reads a message destined for a station that has its bit set in this table, it forwards the
message.
Click OK to accept your edits and close the Controller Properties dialog box.
DF1 Slave - by using a controller 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. 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 a single 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.
See page 90 .