Viconics VT7607 Echelon Integration Guide - Manual (Page 17)

17
Configuration Objects
The following SNVT and UNVT should be typically used for configuration purposes:
nciCfg1RtuHp;
nciSetpoints;
nciCfg3RtuHp;
nviDaySchedule[0]
nviDaySchedule[1]
nviDaySchedule[2]
nviDaySchedule[3]
nviDaySchedule[4]
nviDaySchedule[5]
nviDaySchedule[6]
Wiring Guide
Overview
For clarity we will use the term “Device” to represent any product with an active Echelon network
connection, including Viconics and non-Viconics controllers.
Summary Specifications:
Parameter Details
Network Wiring 24 to 16AWG, twisted pair
Maximum total wire length
1
1600 feet (500 meters) in free topology
Maximum device-to-device distance 1600 feet (500 meters) in free topology
Polarity Polarity insensitive
Multi-drop Free Topology
Termination for Free Topology Network Segment One RC network with Ra = 52.3
Ω±1%, 1/8W
Termination for Doubly Terminated Bus Network
Segment Two RC network with Ra = 105
Ω±1%, 1/8W
Number of transceivers per segment Up to 64
Baud rate 78000 bits per second
1
Network segment length varies depending on wire type.
Table 1: Summary of Specifications for a Viconics’ EIA-485 Network
Network Configuration
The Echelon network is designed to support free topology wiring and will accommodate bus, star, loop or
any of these topologies. Echelon devices can be located at any point along the network wiring.
Figures 3.1 to 3.5 present five different network topologies. The actual termination circuit will vary by
application.