OPTO 22 SNAP-PAC-R1, Руководство пользователя

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SNAP PAC R-Series Controller User’s Guide
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17
Chapter 3
3: System Information
This chapter explains how to use SNAP PAC R-series controllers in an Ethernet network and
how to communicate with them. It also provides information on system architecture,
specifications, and features.
In This Chapter
Communication Options ................................................... 17
System Architecture ............................................................. 20
Networking .............................................................................. 27
Specifications, Connectors, and Dimensions ............ 35
Information on Features ..................................................... 41
SNAP-PAC-R1 and -R2 Comparison Chart .................. 44
Communication Options
SNAP PAC R-series controllers communicate using TCP/IP or UDP/IP over a wired or wireless
network.
Physical Layer —All SNAP PAC R-series controllers communicate over a 10- or 100-Mbps
wired Ethernet link. SNAP PAC R-series controllers can also communicate using a modem
over PPP. In addition, wired+wireless R-series PACs can communicate over a wireless LAN.
Transport Layer —The key to SNAP PAC R-series controller communication flexibility is the
transport layer, Internet Protocol (IP). Both the Transmission Control Protocol (TCP) and the
User Datagram Protocol (UDP) are used with IP.
Application Layer —Because SNAP PAC R-series controllers use standard IP for the
transport layer, many communication options are possible in the application layer. After the
controller is installed and has an IP address assigned (see
page 10 ), you can communicate
with it using the following methods:
• PAC Manager software utility is used for assigning IP addresses, configuring I/O points
and features, and performing onetime reads and writes.
• PAC Control strategies running on a SNAP PAC R-series I/O system industrial
controller can configure, read, and write to I/O points controlled by controllers.