Lenze AC Tech MCH Series Communications Manual
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Lenze AC Tech MCH Series Communications Manual

Bacnet
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BACnet Communications Guide

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Summary of Contents for Lenze AC Tech MCH Series

  • Page 1 MCH Series Drives BACnet Communications Guide...
  • Page 2 About These Instructions This documentation applies to the use of an MCH Series Variable Frequency Drive with BACnet protocol and should be used in conjunction with the MCH Series Installation and Operation Manual (Document MH01) that shipped with the drive. These documents should be read in their entirety as they contain important technical data and describe the installation and operation of the drive.

  • Page 3: Table Of Contents

    Contents 1 Safety Information ......................1 Warnings, Cautions and Notes ................1 1.1.1 General ....................1 1.1.2 Application ....................1 1.1.3 Installation ....................1 1.1.4 Electrical Connection ................2 1.1.5 Operation ....................2 2 Introduction ........................3 MS/TP Communications ..................3 MS/TP Physical Layer ...................3 Serial Communications Wiring ................3 3 Drive Setup and Programming ...................4 Added Programming Parameters ................4 Omitted Parameters and Selections ..............4...

  • Page 4: Safety Information

    Warnings, Cautions and Notes 1.1.1 General Some parts of Lenze controllers (frequency inverters, servo inverters, DC controllers) can be live, moving and rotating. Some surfaces can be hot. Non-authorized removal of the required cover, inappropriate use, and incorrect installation or operation creates the risk of severe injury to personnel or damage to equipment.

  • Page 5: Electrical Connection

    Safety Information 1.1.4 Electrical Connection When working on live drive controllers, applicable national regulations for the prevention of accidents (e.g. VBG 4) must be observed. The electrical installation must be carried out in accordance with the appropriate regulations (e.g. cable cross-sections, fuses, PE connection). Additional information can be obtained from the regulatory documentation.

  • Page 6: Introduction

    Introduction Introduction This document will explain how to operate an MCH Drive using BACnet protocol on a Master-Slave/Token- Passing (MS/TP) LAN. 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).

  • Page 7: Drive Setup And Programming

    Drive Setup & Programming Drive Setup and Programming Most drive parameters (including those required for serial communications) are not accessible through the LAN. They can only be accessed by entering the Programming Mode of the drive itself. Refer to the MCH Installation and Operation Manual (MH01) for more information.

  • Page 8: Modified Parameters And Selections

    Drive Setup & Programming Modified Parameters and Selections 24 AUTO SOURCE The default selection for this parameter has been changed to KEYPAD. Refer to Section 3.4 Serial Communications Setup for more information. 32 HZ MULTIPLIER The default setting for this parameter has been changed to 30.00. Refer to Section 3.4 Serial Communications Setup for more information.
  • Page 9 Drive Setup & Programming NOTE • Drive Parameter #30 (CONTROL) must be set to SERIAL AUTO or S AUTO/NO HND in order to start the drive over the LAN. • The upper left corner of the drive display must indicate SSTOP for a serial start command to be accepted by the drive.
  • Page 10 Drive Setup & Programming 57 SERIAL This parameter needs to be set to either WITH TIMER (default) or W/O TIMER for the drive to communicate with the LAN. Serial communications will not work if this parameter is set to DISABLED. 58 MAC ADDRESS This parameter contains the address of the MCH drive.

  • Page 11: Mch Bacnet® Objects

    BACnet Objects MCH BACnet® Objects The MCH BACnet® Objects are divided into seven types: analog input, analog value, binary input, binary output, binary value, multi-state input and multi-state value. Sections 4.2 through 4.8 describe each of these object types and the individual object instances within each. BACnet®...

  • Page 12: Analog Input (Ai) Object Descriptions

    BACnet Objects Analog Input (AI) Object Descriptions Object AI-1: Actual Frequency This object represents the actual speed of the drive in Hz. Object AI-2: Command Frequency This object represents the commanded drive speed in Hz. Object AI-3: Load Percent This object represents the drive’s load current as a % of rated current. Object AI-4: Total Runtime This object represents the number of hours that the drive has been running since its first...

  • Page 13: Binary Input (Bi) Object Descriptions

    BACnet Objects Binary Input (BI) Object Descriptions Object BI-1: Run / Stop Status This object indicates whether or not the drive is currently running. Object BI-2: Current Direction This object indicates the direction in which the drive is currently running. Object BI-3: Fault Condition This object indicates whether or not the drive is currently tripped on a fault.

  • Page 14: Multi-State Input (Msi) Object Descriptions

    BACnet Objects Multi-State Input (MSI) Object Descriptions Object MSI-1: Operational Status This object is for monitoring the actual operating condition of the drive. The value returned is a number between 1 and 16 which corresponds to one of the following operating states: Value Name Operational State...
  • Page 15 BACnet Objects Object MSI-3: PID Mode This object is for monitoring the general state of the drive’s PID mode as specified by Drive Parameter #70 (PID Mode). State Name PID Control PID disabled. NORMAL Enable direct-acting system (INC FDBK, DEC MTR SPD) REVERSE Enable reverse-acting system (INC FDBK, INC MTR SPD) Object MSI-4: H/O/A Mode...

  • Page 16: Multi-State Value (Msv) Object Descriptions

    LAN is dictated by Drive Parameter #30 (Control) and the drive HOA (refer to MSI-4) For more information on SPEED SOURCE, refer to the MCH Installation and Operation Manual (MH01). Reference and Links MCH Series Variable Frequency Drives visit: http://www.lenze-actech.com BACnet and ASHRAE, Inc. visit: http://www.bacnet.org RG-MHBAC...
  • Page 17 AC Technology Corporation 630 Douglas Street • Uxbridge MA 01569 • USA Sales: 800-217-9100 •Service: 508-278-9100 www.lenze-actech.com RG-MHBAC-e2...

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