是否加工定制:否别名:通讯模块品名:模块产地:美国快递:顺丰快递
If the DF1 master port is configured to support the DF1 half-duplex protocol, the master port can be used to route messages between slaves. Peer-to-peer communication is accomplished by the master constantly polling all the slaves on the network and relaying the messages received. The slaves must contain ladder logic with MSG commands to generate and accept messages. This routing can be used in conjunction with the normal command processing discussed above.
Before you configure and install the network, you should create a plan for it. The following points assume that you are creating a bridge network of a master and repeaters, as needed, to work with devices on existing wireless LANs.
The simplest way to design the physical network of radios, antennas, connectors, cables, amplifiers and other accessories, is to use ProSoft Wireless Designer (page 22). This application determines your hardware needs based on your answers to a few questions, and then generates a Bill of Materials specifying all the components you will need for your installation.
Choose the appropriate antennas for the network. If an antenna will be connected to the radio by a long cable, you might need to purchase a power amplifier, which is available from ProSoft Technology. The more distance between an antenna and its radio, the more ** loss the radio will have. For more information, see Antennas (page 140).
Consider drawing up your network plans on paper. As part of the drawing, you should assign a logical name to each radio. You can use these names later when configuring the radios in the RadioLinx Configuration Manager.
As part of your planning, you might want to conduct a site survey. ProSoft Technology can perform this survey, you can do it yourself, or you can hire a surveyor.
Protect radios from direct exposure to weather, and provide an adequate, stable power source. Make sure that your plan complies with
A network's performance is affected by attributes specific to the installation site. Consider the following cautions, where possible, to optimize your network installation:
Design the network to use less than 2048 radios (per network)
Place radios within the specified 15 miles of each other
Add repeater to extend distance or where line of sight is limited
Radios or antennas CANNOT be placed within 8 inches (20 cm) of where people will be
Though radio frequency communication is reliable, sometimes its performance can be affected by intangibles. A good network installation plan includes time and resources for performance testing and installation changes.
Test the installation plan (page 41) before the network installation is complete.
ProSoft Technology, Inc.
Page 21 of 21
July 9, 2012
To begin, determine where you need radios and then choose locations for them accordingly. For example, you might decide to install your master radio near a PC in a central plant location (You can use the PC to configure the radios through the RadioLinx Configuration Manager). If the plant is an oil refinery, for example, you might decide to install radios near the oil tanks.
The next important issue is how to link the radios. Unless the radios are very close together, you must make sure that each pair of radio antennas in the network has a line of sight between them. In other words, you must be able to see from one antenna to another, either with the naked eye, or with binoculars.
If a line of sight does not exist between antennas, you must choose a site for installing a repeater radio, which will create a bridge between the radio antennas.