Delta RMC101 Manuale Utente Scaricare il pdf (Pagina 314)

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101

RMC100 and RMCWin User Manual

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This is an open application protocol developed and used by Omron Electronics Inc. This protocol

is available over a number of media, including Ethernet and serial. Additional information is

available in the CS1 Communications Reference Manual, available on Omron's web site:

http://www.omron.com/oei.

• HEI (Host Engineering Inc)

This is a proprietary protocol controlled by Host Engineering Inc (http://www.hosteng.com). This

application protocol can be run on top of UDP/IP, IPX, and Ethernet II. The RMC can respond to

HEI requests over UDP/IP and Ethernet II.

• ICMP (Internet Control Message Protocol)

This protocol—running on top of the Internet Protocol—is used for sending error messages

between routers and also provides the ping service. Only the ping service portion of this protocol

is used by the RMC. Ping is a utility provided on most operating systems that simply asks if a

device can be found with a given IP address or name.

• IEEE 802.3 for 10BaseT

This is a standard for sending Ethernet data at 10Mbps through twisted pair wiring rated Category

3 (CAT3) or greater. The connectors used by this standard are RJ45. Media converters are

readily available from network supply companies to convert these signals to other IEEE 802.3

standards such as 10Base2 (BNC or coaxial cable), 10BaseFL (fiber optic), 10Base5 (AUI), and

100BaseT (100Mbps twisted pair using CAT5 wiring).

• IP (Internet Protocol)

This is the main Internet Layer protocol and is used for sending packets between two computers

in a network or across two or more networks. It also allows for fragmentation of packets. This is a

situation where a packet is larger than a network's maximum packet size, so it is broken into

smaller packets that are re-assembled by the recipient.

• ISO-on-TCP

This application protocol was designed to allow using protocols based on the ISO 8073 Transport

Protocol to work on the TCP/IP stack of protocols. This protocol is used by the Siemens S7-300

and S7-400 PLCs. IEEE maintains this protocol. The RMC supports a protocol on top on the ISO-

on-TCP protocol called Fetch/Write that is also supported by the S7 PLCs.

• Modbus/TCP

This is an open protocol developed and used by Modicon of Schneider Electric. Its standard is

published on Modicon's web-site: http://www.modicon.com/openmbus.

• TCP (Transmission Control Protocol)

This is the main Transport Layer protocol in the TCP/IP stack. It provides for maintaining a

reliable connection between two devices.

• UDP (User Datagram Protocol)

This Transport Layer protocol is used by some application protocols instead of TCP. UDP is

lighter weight than TCP and works well in situations where acknowledgements are built into the

application protocol or are not required.

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