Introduction; Bacnet ® Overview - Neptronic EFCB Series User Manual

Introduction

This document provides information on using the Neptronic controller communications feature. This product
®
provides a BACnet network interface between BACnet
®
BACnet Master Slave/Token Passing (MS/TP) protocol at the BACnet
This document assumes you are familiar with BACnet
®
BACnet Overview
Performance
The controller uses a synchronous implementation for BACnet
request is answered as quickly as possible without using Reply Postponed. In particular, MS/TP implementation
performs within Tusage_delay of 15ms in order to assure Tusage_timeout values within 20ms.
Support for MS/TP
The controller supports a Full Master Node state machine for MS/TP. All parameters are configured via the
thermostat menu or via the BACnet
immediately and does not require a restart of the controller. For more information the configurable properties,
please refert to the Getting Started section on page 3. For more information on the thermostat menu, please
refer to the controller's Specification & Installation Manual for more details.
BIBB Support
The controller generally behaves as a B-ASC type profile server. The following specific BIBBs are supported per
their relevant definitions in Annex K to BACnet
DM-DOB-B, DM-DCC-B
Object Support (in general)
The controller supports a table-based fixed list of BACnet
®
various BACnet standard object types, in addition to a Device object.
Alarms
Although the controller supports the ability to indicate various alarm conditions through value changes in
properties of several of its objects, it does not generate BACnet
Features
Neptronic controllers also offer the following time-saving features.
Auto Baud Rate Detection
The controller automatically configures its baud rate by detecting the network speed upon connection.
Auto Device Instance Configuration
The controller automatically configures its device instance to 153000 + MAC address.
Copy Configuration
Copy the controller's entire configuration and broadcast it to other controllers of the same type on the same
network.
®
client devices and Neptronic controllers. It uses the
®
and BACnet
®
WriteProperty service. Changes made via the WriteProperty take effect
®
: DS-RP-B, DS-RPM-B, DS-WP-B, DS-WPM-B, DM-DDB-B,
®
-visible values which appear as Present_Values of
EFCB Series Controller
®
MAC layer.
®
terminology.
®
messages. Each BACnet
®
Event Notifications.
®
confirmed service
Page | 2