www.DaikinApplied.com 3 IM 743-7 • MICROTECH II CHILLER UNIT CONTROLLER
This manual contains information regarding the network
integration system used with MicroTech
®
II unit controllers on
Daikin Applied chillers. It describes how to install or replace
a Modbus
®
communication module on a MicroTech
II chiller
unit controller. It also explains how to set network parameters
and establish communication between the chiller and Modbus
network.
Revision History
IM 743-0 Apr 2003 Initial release.
IM 743-1 May 2005 Removed references to RS 232 serial
connection. Added WGS, WMC, HSC, TSC, and
HDC models to Reference Documents section
and cover page. Corrected pin connections on
Figure 6. Added notes under Unit Setup for
Network Control and Network Address and Baud
Rate sections.
IM 743-2 Nov 2005 Added setup for screw and scroll chillers.
IM 743-3 Apr 2007 Removed RS-485 part number from replacement
parts list.
IM 743-4 Apr 2009 Added TGZ model. Corrected Figure 2 and
corresponding table with proper network pin
connections. Changed Unit Setup for Modbus
Network Control section to refer to unit keypad.
IM 743-5 Dec2010 Updated chiller models on cover page and
password menu screens.
IM 743-6 Mar 2017 Updated Daikin Applied branding and
associated reference, document part numbers,
major formatting revisions, added specs,
IM 743-7 Jun 2022 Corrected Software Revision section. Updated
Reference documents.
Software Revision
This document supports all versions of the standard
MicroTech II Chiller Unit Controller application and all
subsequent versions until otherwise indicated. However, if your
software is of a later version, some of the information in this
document may not completely describe your application.
Limited Warranty
Consult your local Daikin Applied representative for warranty
www.DaikinApplied.com.
Reference Documents
Company Number Title Source
Modbus-IDA.
ORG
Modbus Application
V1.1b
www.Modbus.
org
Modbus-IDA.
ORG
Modbus over Serial
Implementation Guide
V1.02
www.Modbus.
org
Daikin Applied ED 15063
MicroTech II Modbus
Chiller Unit Controller
Protocol Document
www.
DaikinApplied.
com
Daikin Applied IOM 1210
WMC - Magnetic Bearing
Compressor Chiller
Installation, Operation,
and Maintenance Manual
www.
DaikinApplied.
com
Daikin Applied IOM 1274
WSC - Single Centrifugal
Compressor Installation,
Operation, and
Maintenance Manual
www.
DaikinApplied.
com
Daikin Applied IOM 1281
WDC/WCC - Dual
Centrifugal Compressor
Installation, Operation,
and Maintenance Manual
www.
DaikinApplied.
com
Daikin Applied IOM 1319
Recovery Water Heaters
Operating Manual
www.
DaikinApplied.
com
Daikin Applied IOM 1322
WGZ - Water-Cooled
Scroll Chiller Operation
and Maintenance Manual
www.
DaikinApplied.
com
Daikin Applied
IOMM ACZ/
AGZ
(Legacy)
Air-Cooled Condensing
Unit Installation,
Operation, and
Maintenance Manual
www.
DaikinApplied.
com
Daikin Applied
IOMM AGZ
(Legacy)
Air-Cooled Scroll Chiller
Installation, Operation,
and Maintenance Manual
www.
DaikinApplied.
com
Daikin Applied
IOMM WPV
(Legacy)
Centrifugal Chiller
Installation, Operation,
and Maintenance Manual
www.
DaikinApplied.
com
Daikin Applied
OM 1127
(Legacy)
AGS - Air-Cooled Screw
Chiller Operating Manual
www.
DaikinApplied.
com
Daikin Applied
OM WGS
(Legacy)
Water-Cooled Screw
Chiller Operating Manual
www.
DaikinApplied.
com
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