2 introduction, 1 hardware description, Hardware description – Lenze MCH Series Drives User Manual
Page 6: Introduction, 2introduction
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Introduction
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Introduction
This document explains how to connect an MCH Drive to a LonWorks® network. It is intended as a serial
communications supplement only and will not discuss normal drive operations. For more information
regarding normal drive setup and functionality, refer to the MCH Installation and Operation Manual (MH01).
LonWorks® technology is a complete platform for implementing control network systems. These networks
consist of intelligent control devices or nodes that interact with their environment and communicate with
each other using a common, message based protocol (LonTalk®). A LonWorks® network can consist of
up to 32,385 nodes divided into 255 subnets (127 nodes/subnet).
2.1 Hardware Description
To connect to a LonWorks® network, the MCH Drive utilizes an Anybus-S® Drive Profile Embedded
Interface Card that supports Version 1.1 of the LonMark® 6010 Functional Profile for Variable Speed Motor
Drives. This Anybus-S LonWorks (ABS-LON®) module is located inside of the bypass or option box that is
attached to the MCH Drive.
The ABS-LON® module communicates according to the LonTalk® protocol. This means that it can
communicate with all LonWorks® nodes that comply with this protocol, but it does not necessarily mean
that all services available in the LonTalk® protocol are supported.
The ABS-LON® module uses the FTT-10A (Free Topology Twisted Pair) transceiver from Echelon Corporation.
This is the most commonly used twisted-pair media in building automation and this architecture supports
star, bus and loop wiring. The FTT-10A transceiver connects to a twisted pair cable with a baud rate of 78
kbit/s. The FTT-10A transceiver appears as a high impedance to the network when unpowered, and does
not interfere with network communications when powered down.
Figure 1 identifies the components of the communications module intended for user interaction.
Watchdog LED
LED Status Indicators
Service Pin Pushbutton
Socket for LonWorks
Bus Connector
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4
2
3
Figure 1: MCH LonWorks® Comm Module