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Fieldbus Communication
BACnet/IP
WAGO-I/O-SYSTEM
750
BACnet/IP Controller
BACnet Application Layer
This layer represents the application layer and interface with the outside. Here,
communication takes place via BACnet.
BACnet Network Layer
On this relay level, data transport via BACnet, PROFIBUS FMS, World-FIP
and/or EIBnet takes place.
BACnet Virtual Link Layer (BVLL)
This layer includes the backup and bit transmission of data. The data can be
transmitted using protocols and connection possibilities that are established in
the Standard. The following technologies are supported:
•
ARCNET (Attached Resources Computer Network)
as a networking
technology for local networks (mostly USA)
•
ETHERNET
as a transmission technology in local networks; specifies
transmission media of the physical layer (layer 1 of the OSI Model) and
also serves as transmission backup in layer 2 of the OSI Model
•
BACnet/IP
uses the UDP Protocol (User Datagram Protocol) for data
transmission
•
PTP (Point-To-Point) via RS232
as serial connections; enables point-to-
point connections between two participants, e.g. over a telephone line.
•
MS/TP (Master-Slave/Token-Passing) via RS485
as a serial network for
long lengths of line and simple construction and wiring
•
LonTalk ANSI/EIA709.1
as a fieldbus from the company Echelon with
decentralized control; BACnet uses the transport layers of LonTalk (e.g.
FTT-10 over 2-wire)
Содержание 750-830
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