Technical Overview; Copyright, Limitation Of Liability And Revision Rights - Danfoss DriveMotor FCP 106 BACnet Operating Instructions Manual

Introduction
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Conventions
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Numbered lists indicate procedures.
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Bullet lists indicate
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Italicised text indicates
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* indicates default setting of a parameter.

1.4 Technical Overview

BACnet (Building Automation and Control Network) is an
open data communications protocol, American National
Standard (ANSI/ASHRAE 135-2008). BACnet enables
computer-based control equipment from different
manufacturers to work together. BACnet is designed to
handle many types of building controls, including HVAC,
lighting, security, fire, access control, maintenance, and
waste management. BACnet permits flexibility for
expansion and different equipment combinations.
Conformance Classes, Function Groups, and the PICS:
Evaluating the capabilities of a BACnet device is potentially
a formidable task, given the great choice of Objects,
Properties, and Services, which can be implemented. It is
not necessary for every BACnet device to have a full
BACnet implementation, to carry out its task. The ASHRAE
BACnet Committee recognised this problem and
responded with aids to evaluation in the form of
"Conformance Classes," "Function Groups" and the
"Protocol Implementation Conformance Statement" (PICS).
The BACnet protocol defines 6 levels of Conformance
Classes, each of which specifies the minimum subset of
Services implemented on the device. The lowest level,
Conformance Class 1, requires only that the BACnet device
contains a Device Object and that it is able to execute
(respond to) a ReadProperty Service request. Each
successive Conformance Class level adds Service Requests
that must be executable by the device, as well as the
Service Requests it must be able to initiate. Conformance
Class 6 requires 21 types of Service Requests (of the 32
overall) to be implemented, of which 20 must be initiable
and 17 executable. Conformance Class thus provides a
measure of the ability of the device to communicate.
Function Groups specify a combination of Objects and
Services necessary to carry out certain building automation
functions. They are specified independently of
Conformance Class, though the implementation of some of
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VLT
other information, and
description of illustrations.
cross reference
link
parameter name
MG03O102 - Danfoss A/S © 12/2013. All rights reserved.
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DriveMotor FCP 106 & FCM 106 BACnet Operating Instructions
the Function Groups automatically confers some
Conformance Class higher than 1.
Background information
Protocol name
Technology developer
Year introduced
Governing standards
Openness
Physical characteristics
Network topology
Physical media
Max. Distance at low speed
Transport mechanism
Communication methods
Baud Rates Supported
Termination
Table 1.2 Overview
1.4.1 Assumptions
This manual assumes that
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the BACnet Protocol is used with the FCP 106 or
FCM 106 frequency converter.
•
the system is equipped with a firmware
supporting the BACnet communication services
required by the application
•
all requirements stipulated in the BACnet
standard, as well as those pertaining to the
frequency converter are strictly observed as well
as all limitations therein fully respected.
1.4.2 Background Knowledge
The Danfoss BACnet Protocol is designed to communicate
with any system complying with the BACnet MS/TP
standard. Familiarity with the PC, BMS or PLC used as a
master in the system is assumed. Issues regarding
hardware or software produced by other manufacturers are
beyond the scope of this manual and are not the responsi-
bility of Danfoss.
In case of questions regarding set-up of master-to-master
communication or communication to a non-Danfoss
follower, consult the appropriate manuals.
1.5 Copyright, Limitation of Liability and
Revision Rights
This publication contains information proprietary to
Danfoss. By accepting and using this manual the user
agrees that the information contained herein is used solely
for operating equipment from Danfoss or equipment from
BACnet
ASHRAE
1995
ANSI/ASHRAE Standard
135-2008 version 4, ISO 16484-5
Open specification
Bus
Shielded twisted pair
1200 m
MS/TP
9600, 19200, 38400, 76800
120 Ω