pdf - Opto 22 SNAP Ethernet I/O Frequently Asked Questions (FAQ)
pdf - Opto 22 SNAP Ethernet I/O Frequently Asked Questions (FAQ)
pdf - Opto 22 SNAP Ethernet I/O Frequently Asked Questions (FAQ)
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<strong>Opto</strong> <strong>22</strong> <strong>SNAP</strong> <strong>Ethernet</strong> I/O: <strong>Frequently</strong> <strong>Asked</strong> <strong>Questions</strong> (<strong>FAQ</strong>) pg. 7/12<br />
2.00 About the <strong>Opto</strong> <strong>22</strong> <strong>SNAP</strong> <strong>Ethernet</strong> I/O System (cont.)<br />
software package that has an OPC interface, a Modbus/TCP driver, or a native <strong>Opto</strong> <strong>22</strong> <strong>Ethernet</strong><br />
driver.<br />
2.30 What is a <strong>SNAP</strong> <strong>Ethernet</strong> “brain”?<br />
A <strong>SNAP</strong> <strong>Ethernet</strong> brain is a compact, high-performance communications and I/O<br />
processor. The <strong>SNAP</strong> <strong>Ethernet</strong> brain family currently includes four products: the <strong>SNAP</strong>-B3000-<br />
ENET, the <strong>SNAP</strong>-ENET-D64, the <strong>SNAP</strong>-ENET-RTC, and the <strong>SNAP</strong>-WLAN-FH-ADS. The <strong>SNAP</strong>-<br />
B3000-ENET brain is designed to remotely interface with a mix of analog, digital, and serial I/O<br />
modules. The <strong>SNAP</strong>-ENET-D64 brain is a digital-only processor that controls up to 64 points of<br />
digital I/O on one compact mounting rack. The <strong>SNAP</strong>-ENET-RTC includes a battery-backed realtime<br />
clock to time stamp e-mail messages and data. The <strong>SNAP</strong>-WLAN-FH-ADS Wireless LAN<br />
brain extends your <strong>SNAP</strong> <strong>Ethernet</strong> I/O network to areas where it is impossible or uneconomical<br />
to run network wiring. <strong>SNAP</strong> <strong>Ethernet</strong> brains support both 10BASE-T and 100BASE-TX cabling.<br />
The brains also have a serial port for programming, diagnostics, and serial networking using<br />
Point-to-Point Protocol (PPP).<br />
2.31 How intelligent are the <strong>SNAP</strong> <strong>Ethernet</strong> brains?<br />
The <strong>SNAP</strong> <strong>Ethernet</strong> brains have limited programmability. While the brains don’t know<br />
what day it is, they can react to digital events, or react to an analog alarm event. For a complete<br />
list of currently supported <strong>SNAP</strong> <strong>Ethernet</strong> I/O features, please refer to <strong>Opto</strong> <strong>22</strong>’s Form<br />
#1112, the <strong>SNAP</strong> <strong>Ethernet</strong> Brain User’s Guide. For more intelligent distributed I/O accessible<br />
over <strong>Ethernet</strong>, check out <strong>Opto</strong> <strong>22</strong>’s powerful programmable <strong>SNAP</strong> Ultimate I/O systems and<br />
<strong>SNAP</strong> industrial controllers, such as the <strong>SNAP</strong>-LCM4.<br />
2.40 What methods can I use to communicate with a <strong>SNAP</strong> <strong>Ethernet</strong> I/O system?<br />
You can use any of the following methods—or all of them simultaneously—to interface<br />
with one or more <strong>Opto</strong> <strong>22</strong> <strong>SNAP</strong> <strong>Ethernet</strong> I/O systems:<br />
• Modbus/TCP driver—used for interfacing with any third-party software or<br />
hardware that uses the standard Modbus/TCP protocol. Any Modbus/TCP-enabled third-party<br />
software—for example, any human-machine interface (HMI) that talks Modbus/TCP—can<br />
interface directly with the <strong>Ethernet</strong> brain. Additionally, any hardware system that communicates<br />
via Modbus/TCP can communicate with the <strong>SNAP</strong> <strong>Ethernet</strong> I/O system.<br />
• OPC server—provides access for OPC clients. Use the OLE for Process Control (OPC)<br />
standard to communicate with the <strong>SNAP</strong> <strong>Ethernet</strong> I/O system. <strong>Opto</strong> <strong>22</strong>’s OPC server, <strong>Opto</strong>ENET<br />
Server, lets OPC clients access one or more <strong>SNAP</strong> <strong>Ethernet</strong> I/O systems.<br />
• <strong>SNAP</strong> <strong>Ethernet</strong> I/O Driver Toolkit—an easy way to program applications for the<br />
<strong>Ethernet</strong> brain. The included ActiveX component and C++ class hide the details of <strong>Ethernet</strong><br />
communications and the memory map protocol for faster programming. Use the ActiveX<br />
component to communicate with the <strong>SNAP</strong> <strong>Ethernet</strong> brains from any Windows programming<br />
For more information,<br />
see <strong>Opto</strong> <strong>22</strong> Form #1112,<br />
the <strong>SNAP</strong> <strong>Ethernet</strong> Brain<br />
User’s Guide.<br />
<strong>Opto</strong> <strong>22</strong> 43044 Business Park Drive Temecula, CA 92590 Phone: (909)695-3000 (800)321-OPTO Fax: (909)695-3095 Internet : www.opto<strong>22</strong>.com<br />
Inside Sales: (800) 452-OPTO Product Support: (800) TEK-OPTO (909) 695-3080 Fax: (909) 695-3017 E-mail: support@opto<strong>22</strong>.com FaxBack: (800) 474-OPTO
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