Table of Contents
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Table of Contents
Related Manuals for ABB ACH 400
Summarization of Contents
Safety Instructions
Overview
Describes manual's purpose, contents, and intended audience.
Warnings and Notes
Explains the meaning and usage of warnings and notes in the manual.
Warnings
Details safety warnings with symbols for potential injury or equipment damage.
General Safety Instructions
Provides essential safety guidelines for installation and maintenance work on the drive.
Notes
Highlights points requiring special attention or additional information.
Caution
Draws special attention to a particular issue or point.
Chapter 1 – Introduction
How To Use This Manual
Explains the purpose of the manual and how to navigate its content and chapters.
Intended Audience
Defines the necessary knowledge and experience for the manual's users.
Conventions Used In This Manual
Explains terms, symbols, and language conventions used throughout the document.
Analog Inputs
Defines analog input points as real number values from the drive to Metasys.
Analog Outputs
Defines analog output points as real number values from Metasys to the drive.
Binary Inputs
Defines binary input points as boolean values from the drive to Metasys for status.
Binary Outputs
Defines binary output points as boolean values from Metasys to the drive for control.
Change of State (COS)
Describes the reporting of state changes for analog and binary points to Metasys.
N1LAN
Explains N1LAN as the Metasys communications backbone for network integration.
N2Bus
Defines the N2 Bus for connecting interfaces and controllers to Network Control Units.
On-Line / Off-Line
Explains the states of a node on the N2 Bus and how they are determined.
Terminal Block
Explains the notation for terminal blocks and connections used in the manual.
Related Publications
Lists other ABB manuals relevant for additional drive information.
Chapter 2 – Overview of the N2 Connection
Introduction
Describes the general features of the N2 Bus and its use with ACS/ACH 400 drives.
Metasys Integration
Illustrates the integration of ABB drives with the Johnson Controls Metasys system via N2 Bus.
Device Type
Specifies the device type 'VND' for ACS/ACH 400 drives in Metasys and Companion products.
DDL File
References the ACH400.DDL file for defining points for NCU units.
Chapter 3 – Installation
Introduction
Describes N2 network installation for ACS/ACH 400 drives using RS-485.
Controlling the drive
Explains how Metasys sends Analog/Digital output values to control the drive.
Feedback from the drive
Details how Metasys reads Analog and Digital Input points from the drive.
Hardware Installation
Covers the RS-485 connection using shielded, twisted-pair cable for the N2 Bus.
Wiring
Recommends specific wiring practices using Belden 9842 cable for the N2 Bus.
Connections
Describes how the network should be physically connected according to diagrams.
Grounding and Termination
Explains proper grounding and termination for the RS-485 N2 Bus network.
Chapter 4 – Programming
Programming of the Drive
Describes how to program ACS/ACH 400 drives for N2 Bus communication.
Supported Features
Details the 'virtual object' components used by the N2 Bus protocol.
Analog Input
Lists features supported by analog input points for N2 Bus communication.
Binary Input
Lists features supported by binary input points for N2 Bus communication.
Analog Output
Lists features supported by analog output points for N2 Bus communication.
Binary Output
Lists features supported by binary output points for N2 Bus communication.
Communication Setup
Details parameters for activating and configuring the direct N2 Bus connection.
Protocol Software Error
Lists and explains protocol software error codes for the N2 Bus.
Output Point Configuration
Explains how to configure output points for controlling the drive via the N2 Bus.
Analog Outputs
Lists analog output points and required parameter settings for N2 Bus interface.
Binary Outputs
Lists binary output points and required parameter settings for N2 Bus interface.
Fault Queue
Describes the ACS/ACH 400's fault queue feature for recording recent faults.
Faults
Lists and describes common drive faults and their corresponding codes.
Chapter 5 – Fault Tracing
Fault Diagnostics
Focuses on troubleshooting N2 Bus connection problems using counters and queues.
Normal operation
Describes expected behavior of message counters during normal network operation.
No Metasys station on line
Diagnoses and corrects issues where no Metasys station is detected on the network.
Duplicate station
Diagnoses and corrects problems caused by duplicate station numbers on the network.
Swapped wires
Diagnoses and corrects issues arising from swapped RS-485 wires.
Oem Application Fault
Identifies the OEM Application Fault as a communication loss indication.
Intermittent off-line occurrences
Addresses intermittent connection loss and how to prevent it during parameter changes.
Metasys Commissioning
Guides on verifying N2 Bus installation and commissioning steps per Johnson Controls documentation.
Summary
Summarizes common N2 Bus startup problems and their potential causes like connections or grounding.
Appendix A – I/O Point List
Parameters
Lists all I/O points for the ACS/ACH 400 drive with type, number, units, and range.
Appendix B – DDL File for NCU
ACH_400.DDL
Provides the Data Definition Language file listing for ACS/ACH 400 drives used with NCU units.
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