Honeywell Centraline FALCON - Page 19

USER GUIDE FALCON
EN2Z-0962GE51 R0715
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Application layer
Application layer
Presentation layer
Session layer
Transport layer
Transport layer
Network layer
Network layer
Data link layer
Physical layer
Link layer
BACnet *
IP *
Ethernet
BACnet
Functions
Physical
Protocol
Ethernet
OSI Model
TCP / IP Model BACnet over IP*
Fig. 6. Networking model of Excel Web controller
Network Load The network load for one Excel Web controller in combination with one EBI central
is about 1 % network load in a 10 Mbit network.
These figures are based on the following assumptions:
• 20 BACnet properties per display
• BACnet properties are updated by 5 EBI displays simultaneously
• Each property is updated every 5 s. One update message for a simple property
needs 100 bytes, for a complex property 200 bytes.
Calculation: 5 displays * 20 properties/display * 150 bytes/property *
1 update/5 s = 30000 bits per second.
If alarms should be received and properties should be in trend, everything should
not consume more than 100 Kbits/s, which is 0,1 % in a 100 Mbit network.
Communication Protocols BACnet/IP - ISO 16484-5 – ENV 13321-1
Communication with other Excel Web® controllers, with 3
rd
-party BACnet® devices,
with Honeywell Enterprise Buildings Integrator™ and SymmetrE® front-ends, and
with 3
rd
-party BACnet® front-ends is based on the international BACnet® Protocol.
More details on the BACnet® Interoperability can be obtained from the Excel Web®
Protocol Implementation Conformance Statement (PICS).
LonTalk®
Communication with physical I/O modules, with room and zone controllers, and with
Excel 50/500 controllers is based on LonTalk®.
A Free Topology Transceiver (FTT-10A or FT-X1) allows a communication speed of
78 KBaud.
In typical cases, field devices are controlled via Honeywell Distributed I/O
(XFL52xB) or Smart I/O (XFCxxx) modules. Maximum cable lengths are 320 m to
2,200 m.
HTTP
Excel Web® can be operated using a standard Internet Explorer (5.5 or higher) or
Netscape (6.2.1 or higher). The required minimum screen resolution is 800 x 600
pixels. For more details, please refer to the "Operating the Excel Web HTML
Interface" section.
FTP
The firmware and application are downloaded via the standard FTP (File Transfer
Protocol).
Telnet
Telnet access to the Excel Web controller is possible for the purpose of service and
diagnostic of the Linux operating system and the Excel Web firmware. In case this is
needed, please contact your Honeywell representative.
SMTP
Simple Mail Transfer Protocol is used for the embedded Email alarming functionality
of Excel Web.