Belkin F5U104-EU-F Bedienungsanleitung PDF herunterladen (Seite 6)

EXCEL WEB CONTROL SYSTEM – NETWORKING WHITE PAPER

EN2B0396GE51 R1214 - 6 -

5) Check BACnet Interoperability of all BACnet devices

that need to be integrated

• Compare BACnet “PICS” of all products to be

integrated:

o Do all devices use the same character set,

e.g. ANSI X 3.4 or ISO Latin 1?

o Limit interoperability requirements to those

BIBBs that are mandatory for a BACnet

Client and a BACnet Server to interoperate.

Be aware that most job specifications

define more BIBBs on Client/Server side

that are necessary for interoperation, or for

the need functionality of the system.

Remember that BIBB A on the Client-Side

must equal BIBB-B on the Server side.

o Agree on the notification class settings on

the jobsite. For 3

 Does the BACnet client

automatically subscribe to

recipient-List, or needs the client

added to the CARE project.

party integrations

following settings and properties needs to

be aligned in the system:

 Instance number of the

notification classes

 Name of the notification classes

 Priortities

 Ack-Required

o Check for the following fall-back

mechanisms in the BACnet client devices.

If these fall-back mechanisms exist, a

BACnet client device will be able to

interoperate with nearly any BACnet server

device:

 Does the BACnet client make use

of polling with “ReadProperty” if

the BACnet server does not

support “COV”?

Typically BACnet/MSTP devices

do not support COV reporting.

 Does the BACnet client make use

of “ReadProperty” if the BACnet

server does not support

“ReadPropertyMultiple”

 Does the BACnet client make use

of “ReadProperty” with

ArrayIndex, if the BACnet server

does not support “ReadProperty”

of the complete Array (e.g.

because of APDU size

restrictions)?

o Verify that the „CreateObject“ is done in a

way supported by the BACnet server

device. Not all properties can be defined in

CreateObject message.

o Check if the BACnet client is able to read &

write the schedules and calendars.

o Check if the BACnet client is able to read

the trendlogs from the controller.

o Verify how lists are written: Is

„WriteProperty“ used in order to write the

complete list, or is „AddElement” used in

order to write single entries if the list?

o Verify how arrays are written: Is the array

size set and single elements are written, or

is the complete array written?

o Verify the version of the BACnet standard

that is supported: Typically BACnet devices

supporting the version 135-2001 are not

compatible with BACnet devices supporting

version 135-2004. In this regard the most

critical areas are schedules and trend,

because here the 135-2004 version has

defined many enhancements which are not

compatible to the 135-2001 version.

• BTL Listed products will guarantee that that part of

the BACnet functionality that has been implemented

has been implemented as per BACnet standard.

BTL listed products will however not guarantee

interoperability in every detail, and BTL listed

products will not replace the detailed checks that

are outlined in this document.

6) Inform yourself about the customer´s network security

concept

• Are there any V-LAN‘s (Virtual LAN´s) designed?

Will you get a V-LAN only for BACnet?

7) Agree upon – or inform yourself about – network

infrastructure

• Network structure and media

• Per HVAC electrical panel a network switch (ideally

panel-rail mounted) should be installed in order to

allow parallel network access for Excel Web to the

BACnet network, for an Internet Browser (e.g.

Touch-panel operator unit), and for a laptop (CARE

start-up and downlowds, debugging via FTP)

• Responsibility of network installation

• When you have V-LAN‘s keep in mind that, maybe,

you must send information from one to the other V-

LAN (for reference points).

8) Agree on BACnet networking issues

• Are all BAcnet devices talking BACnet/IP

• Who provides the necessary routers for

BACnet/Ethernet and/or BACnet/MSTP devices in

the network?

• Get IP addresses (or address range) from the

Customers IT group and allocate IP addresses (or

an address range) to every vendor

• Define only one BBMD (BACnet Broadcast

Management Device) per IP subnet.

• Define only one BACnet router between two

BACnet networks (tree structure of networks. There

is always only one path between two devices)

• BACnet network numbers must be unique in the

whole BACnet internetwork

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