Honeywell Centraline FALCON User Manual page 19

USER GUIDE
Application layer
Presentation layer
Transport layer
Data link layer
Network Load
Communication Protocols
OSI Model TCP / IP Model
Application layer
Session layer
Transport layer
Network layer Network layer
Physical layer
Fig. 6. Networking model of Excel Web controller
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 *
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.
BACnet/IP - ISO 16484-5 – ENV 13321-1
Communication with other Excel Web® controllers, with 3
with Honeywell Enterprise Buildings Integrator™ and SymmetrE® front-ends, and
rd
with 3
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.
BACnet over IP*
BACnet *
IP * Ethernet
Link layer Ethernet
1 update/5 s = 30000 bits per second.
-party BACnet® front-ends is based on the international BACnet® Protocol.
15
BACnet
Functions
Protocol
Physical
rd
-party BACnet® devices,
EN2Z-0962GE51 R0715
FALCON