Table of Contents
Related Manuals for Daikin McQuay MicroTech III
Summary of Contents for Daikin McQuay MicroTech III
- Page 1 Engineering Data ED 15121 Group: Controls Part Number: ED 15121 Date: October 2009 Supersedes: New ® MicroTech Chiller Unit Controller Protocol Information ® Modbus Protocol • ™ Pathfinder Chiller, Model AWS © 2009 McQuay International...
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Page 2: Table Of Contents
Table of Contents TABLE OF CONTENTS................................ 2 ................................4 IMITED ARRANTY ....................................4 OTICE ................................4 EVISION ISTORY ................................4 OFTWARE EVISION ............................... 4 EFERENCE OCUMENTS INTRODUCTION ..................................5 .................................. 5 HILLER ODELS ..............................5 ONTROLLER OINTS MODBUS PROTOCOL INFORMATION ..........................6 .................................. - Page 3 ........................25 VAPORATOR NTERING LUID EMPERATURE ..........................25 VAPORATOR WITCH TATUS ........................25 VAPORATOR EAVING LUID EMPERATURE ............................25 VAPORATOR OURS ..............................25 VAPORATOR TATUS ..........................25 VAPORATOR EFRIGERANT RESSURE ....................26 VAPORATOR ATURATED EFRIGERANT EMPERATURE ................................26 AULT LARM ................................
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Page 4: Limited Warranty
Limited Warranty Consult your local McQuay Representative for warranty details. Refer to Form 933-43285Y. To find your local McQuay Representative, go to www.mcquay.com. Notice © 2009 McQuay International, Minneapolis MN. All rights reserved throughout the world. McQuay International reserves the right to change any information contained herein without prior notice. The user is responsible for determining whether this product is appropriate for his or her application. -
Page 5: Introduction
Introduction ® This document contains the necessary information to incorporate a MicroTech III Chiller Unit Controller from McQuay International into your Building Automation System (BAS). It includes all necessary Modbus® variables and corresponding MicroTech III Chiller Unit Controller data points. Modbus terms and principles are not defined. Refer to the appropriate specifications for definitions and details. -
Page 6: Modbus Protocol Information
Modbus Protocol Information Compatibility The MicroTech III Chiller Unit Controller can be configured in an interoperable Modbus network. The controller must have the corresponding Modbus Communication Module installed. The MicroTech III Chiller Unit Controller conforms to the published Modbus standards. Refer to www.Modbus.org more information. -
Page 7: Valid Error Codes
Valid Error Codes The MicroTech III Chiller Unit Controller supports all exception codes. See Table 2 below for a description of valid error codes. Table 2. Valid Error Codes Error Codes Description Definition Illegal Function The function code received in the query is not an allowable action for the server (or slave). Illegal Data Address The data address received in the query is not an allowable address for the server (or slave). -
Page 8: Example Data Point: Chiller On/Off
Example Data Point: Chiller On/Off This output data point indicates the current state of the chiller. The OFF state is represented by state = FALSE and value = 0. The other discrete states are represented by state = TRUE and value > 0. Data Type Holding Register Measurement... -
Page 9: Typical Application: Minimum Integration
Typical Application: Minimum Integration Display Important Data Points Typical workstation displays of MicroTech III Chiller Unit Controller attributes include the following significant data points (page number of detailed description in parenthesis). Each data point is tagged with a number that identifies it in the Protocol Point Summary Tables. -
Page 10: Protocol Point Summary
Protocol Point Summary The following section provides a summary of Modbus properties available from the MicroTech III Chiller Unit Controller. Tables 4-8 contains the complete list of chiller, circuit, compressor, pump, and miscellaneous data points respectively. The items shown in boldface represent the minimum integration properties (as identified previously in Table 3.) Register Mapping The Modbus Communication Module supports zero-based addressing. - Page 11 155=COMP SHUTDOWN-Evaporator Pressure Sensor Fault #n 161=COMP LOCKOUT-Number of Allowed Re-Starts Exceeded 162=UNIT SHUTDOWN-Evaporator Leaving Water Temp Sensor Fault 163=UNIT SHUTDOWN-Evaporator Entering Water Temperature Sensor Failure 166=COMP SHUTDOWN-Mechanical High Pressure Trip #n 171=COMP SHUTDOWN-Oil Level Low #n 173=COMP SHUTDOWN-Oil Feed Pressure Sensor Fault #n 176=SHUTDOWN–Phase Voltage Protection 177=COMP SHUTDOWN–Starter Fault Comp #n 183=COMP SHUTDOWN-Suction Temp Sensor Fault #n...
- Page 12 Comp #1 32647=COMP SHUTDOWN–Low pressure ratio Circuit #4, Comp #1 32771=COMP SHUTDOWN-Outside Air Temp Sensor Fault 34599=COMP SHUTDOWN–Motor Temp High Circuit #1, Comp #1 34631=COMP SHUTDOWN-Motor Temp High Circuit #2, Comp #1 34663=COMP SHUTDOWN–Motor Temp High Circuit #3, Comp #1 34695=COMP SHUTDOWN–Motor Temp High Circuit #4, Comp #1 34855= COMP SHUTDOWN–Motor Temp Sensor Fault...
- Page 13 Fault Circuit #4, Comp #1 41255=COMP LOCKOUT-Number of Allowed Re-Starts Exceeded Circuit #1, Comp #1 41287=COMP LOCKOUT-Number of Allowed Re-Starts Exceeded Circuit #2, Comp #1 41319=COMP LOCKOUT-Number of Allowed Re-Starts Exceeded Circuit #3, Comp #1 41351=COMP LOCKOUT-Number of Allowed Re-Starts Exceeded Circuit #4, Comp #1 41475=UNIT SHUTDOWN-Evaporator Leaving Water Temp Sensor Fault...
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Page 14: Table 5. Circuit Data Points
48483=COMP SHUTDOWN–No Pressure Change After Start Circuit #3 48515=COMP SHUTDOWN–No Pressure Change After Start Circuit #4 48675=COMP SHUTDOWN–No Pressure at Startup Circuit 48707=COMP SHUTDOWN–No Pressure at Startup Circuit 48739=COMP SHUTDOWN–No Pressure at Startup Circuit 48771=COMP SHUTDOWN–No Pressure at Startup Circuit 48935=COMP SHUTDOWN-Slide position sensor fault Circuit #1, Comp#1 48967=COMP SHUTDOWN-Slide position sensor fault... -
Page 15: Table 6. Compressor Data Points
Table 6. Compressor Data Points Holding Read/ Register Network Control Property Page Description Write (4xxxx) Circuit #1 Compressor #1 Suction Refrigerant Temp -40-230° F (-40°-110° C) Compressor #1 Discharge Refrigerant Temp -40°– 250°F (-40°– 121°C) 0 - 65,535 Compressor #1 Starts 0-999,999 Compressor #1 Run Hours 74-75... -
Page 16: Alarm Data Points
Alarm Data Points The following section describes the alarm data points supported by the MicroTech III Chiller Unit Controller. The unit controller contains one holding register for every possible alarm. These holding registers are read only and can be used to determine if any particular alarm is active or not. -
Page 17: Table 11. Fault Alarms
Table 11. Fault Alarms Holding Register Fault Alarms Description (4xxxx) COMPRESSOR SHUTDOWN - Low pressure ratio Circuit #1, Comp #1 0=Normal, 1=Alarm COMPRESSOR SHUTDOWN - Low pressure ratio Circuit #2, Comp #1 0=Normal, 1=Alarm COMPRESSOR SHUTDOWN - Low pressure ratio Circuit #3, Comp #1 0=Normal, 1=Alarm COMPRESSOR SHUTDOWN - Low pressure ratio Circuit #4, Comp #1 0=Normal, 1=Alarm... - Page 18 Holding Register Fault Alarms Description (4xxxx) COMPRESSOR SHUTDOWN - Oil Feed Pressure Sensor Fault Circuit #3, Comp 0=Normal, 1=Alarm COMPRESSOR SHUTDOWN - Oil Feed Pressure Sensor Fault Circuit #4, Comp 0=Normal, 1=Alarm SHUTDOWN – Phase Voltage Protection 0=Normal, 1=Alarm COMPRESSOR SHUTDOWN - Starter Fault Compressor Circuit #1, Comp #1 0=Normal, 1=Alarm COMPRESSOR SHUTDOWN - Starter Fault Compressor Circuit #2, Comp #1 0=Normal, 1=Alarm...
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Page 19: Detailed Data Point Information
Detailed Data Point Information The following section details the information (the data) available to the Building Automation System (BAS) via the Modbus RTU protocol. This information is used for chiller monitoring and operation. The system integrator also uses this information to create BAS workstation graphics. Active Capacity Limit Output Keypad Menu Path No Keypad Equivalent This read only holding register is a measure of the ratio of operating capacity limit to full capacity expressed in percent. -
Page 20: Application Software Version
Application Software Version Keypad Menu Path Main Menu_About Chiller_Unit S/N= These read only holding registers indicate the software version of the application software. The following example shows the holding register and its value (in hexadecimal), followed by the ASCII character translation. -
Page 21: Chiller Enable Output
Chiller Enable Output Keypad Menu Path Main Menu_View/Set Unit_Status/Settings_Netwrk En SP= This read only holding register indicates if operation of the chiller is disabled or enabled. If the chiller is disabled, it cannot run. If it is enabled, it is allowed to run. Data Type Measurement Units... -
Page 22: Chiller Mode Setpoint - Network
Chiller Mode Setpoint - Network Keypad Menu Path No Keypad Equivalent This read/write holding register is used to change the operating mode of the chiller. The default is Null(0). A value of Null will cause the chiller to run in the Cool mode provided that nothing else is writing to this point. This register is ignored by the chiller application if Chiller Local/Remote is set to Local. -
Page 23: Compressor Discharge Refrigerant Temperature
Compressor Discharge Refrigerant Temperature Keypad Menu Path Main Menu_View/Set Circuit_Circuit #1_Data_Discharge Temp= OR Main Menu_View/Set Circuit_Circuit #2_Data_Discharge Temp= OR Main Menu_View/Set Circuit_Circuit #3_Data_Discharge Temp= OR Main Menu_View/Set Circuit_Circuit #4_Data_Discharge Temp= These read only holding registers indicate the current refrigerant temperature discharged from the compressor. There is a separate holding register for each compressor. -
Page 24: Condenser Refrigerant Pressure
Condenser Refrigerant Pressure Keypad Menu Path Main Menu_View/Set Circuit_Circuit #1_Data_Cond Pressure= OR Main Menu_View/Set Circuit_Circuit #2_Data_Cond Pressure = OR Main Menu_View/Set Circuit_Circuit #3_Data_Cond Pressure = OR Main Menu_View/Set Circuit_Circuit #4_Data_Cond Pressure = These read only holding registers indicate the current condenser pressure. There is a separate holding register for each compressor. -
Page 25: Evaporator Entering Fluid Temperature
Evaporator Entering Fluid Temperature Keypad Menu Path Main Menu_Evaporator EWT= This read only holding register indicates the temperature of the fluid entering the evaporator. Data Type Measurement Units Valid Range Holding Register °F x 10 -40-230° F RO Holding Register Temperature °C x 10 -40-110°... -
Page 26: Evaporator Saturated Refrigerant Temperature
Data Type Holding Register Measurement Units Valid Range Circuit #1=41 Circuit #2=45 Pressure psi x 10 -349.97–349.97 psi RO Holding Register Circuit #3=49 (gauge) kPa x 10 -2413 kPa – 2413 kPa Circuit #4=53 Evaporator Saturated Refrigerant Temperature Keypad Menu Path Main Menu_View/Set Circuit_Circuit #1_Data_Evap Sat Temp= AND Main Menu_View/Set Circuit _Circuit #2_Data_Evap Sat Temp= AND Main Menu_View/Set Circuit _Circuit #3_Data_Evap Sat Temp= AND Main Menu_View/Set Circuit _Circuit #4_Data_Evap Sat Temp=... -
Page 27: Problem Alarm Index
This read only holding register allows individual notification of the active problem code. The alarms are not ordered based on any priority. If multiple problem alarms are present at one time, this object will be set to the alarm that has the highest alarm code. -
Page 28: Alarms
Alarms Alarm Classes Modbus alarms in a MicroTech III Chiller Unit Controller are divided into three classes: Faults, Problems, and Warnings. Fault alarms have the highest severity level. Problem alarms have medium severity level. Warning alarms have the lowest severity level. Fault Alarms Fault alarms require an acknowledgment from the operator. -
Page 29: Clear Alarms - Network
Clear Alarms - Network Keypad Menu Path No Keypad Equivalent This read/write holding register clears all active alarms. Many alarms are automatically clear. Of the alarms that need to be manually cleared, only those listed below can be cleared from the network: •... -
Page 30: Table 13. Modbus Problem Alarms
Table 13. Modbus Problem Alarms Problem Alarms Alarm Class Monitoring Individual Alarm Monitoring Alarm Index Alarm Code Holding Registers Alarm Description (Holding (Holding (0=Normal, 1=Alarm) Register 29) Register 32) 16418 RESTART DELAYED - Power Loss While Running Circuit #1 16450 RESTART DELAYED - Power Loss While Running Circuit #2 16482 RESTART DELAYED - Power Loss While Running Circuit #3... -
Page 31: Table 14. Modbus Fault Alarms
Table 14. Modbus Fault Alarms Fault Alarms Individual Alarm Alarm Class Monitoring Monitoring Alarm Index Alarm Code Alarm Description Holding Registers (Holding Register (Holding (0=Normal, Register 33) 1=Alarm) 32551 COMP SHUTDOWN - Low pressure ratio Circuit #1, Comp #1 32583 COMP SHUTDOWN - Low pressure ratio Circuit #2, Comp #1 32615 COMP SHUTDOWN - Low pressure ratio Circuit #3, Comp #1... - Page 32 Fault Alarms Alarm Class Monitoring Individual Alarm Monitoring Alarm Description Alarm Index Alarm Code Holding Registers (Holding Register (Holding (0=Normal, 1=Alarm) Register 33) 44071 COMPRESSOR SHUTDOWN - Oil Delta Pressure High Circuit #1, Comp #1 44103 COMPRESSOR SHUTDOWN - Oil Delta Pressure High Circuit #2, Comp #1 44135 COMPRESSOR SHUTDOWN - Oil Delta Pressure High Circuit #3, Comp #1 44167...
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Page 33: Appendix A: Ascii Characters Conversion Table
Appendix A: ASCII Characters Conversion Table This table lists the ASCII characters and their decimal and hexadecimal numbers. The MicroTech III Chiller Unit Controller does not support the characters in boldface type. Also, non-printing characters, with the exception of the (Space) character, are not listed in this table and are not supported. -
Page 34: Index
Index Evaporator Flow Switch Status ........25 Evaporator Leaving Fluid Temperature ....10, 25 Evaporator Pump Run Hours ....... 15, 25 Active Alarms............. 29 Evaporator Pump Status ........15, 25 Active Capacity Limit Output ......10, 19 Evaporator Refigerant Pressure........14 Active Setpoint ............. - Page 35 This document contains the most current product information as of this printing. For the most up- to-date product information, please go to www.mcquay.com. ED 15121...