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           ED 15121

   

   

Table of Contents 

TABLE OF CONTENTS

........................................................................................................................................................ 2 

L

IMITED 

W

ARRANTY

............................................................................................................................................................. 4 

N

OTICE

.................................................................................................................................................................................. 4 

R

EVISION 

H

ISTORY

................................................................................................................................................................ 4 

S

OFTWARE 

R

EVISION

............................................................................................................................................................. 4 

R

EFERENCE 

D

OCUMENTS

....................................................................................................................................................... 4 

INTRODUCTION

.................................................................................................................................................................... 5 

C

HILLER 

M

ODELS

.................................................................................................................................................................. 5 

C

ONTROLLER 

D

ATA 

P

OINTS

.................................................................................................................................................. 5 

MODBUS PROTOCOL INFORMATION

............................................................................................................................ 6 

C

OMPATIBILITY

..................................................................................................................................................................... 6 

P

ROTOCOL 

D

EFINITIONS

........................................................................................................................................................ 6 

V

ALID 

F

UNCTION 

C

ODES

....................................................................................................................................................... 6 

V

ALID 

E

RROR 

C

ODES

............................................................................................................................................................ 7 

M

ODBUS 

A

DDRESSING

........................................................................................................................................................... 7 

M

ODBUS 

D

ATA 

P

OINT

........................................................................................................................................................... 7 

E

XAMPLE 

D

ATA 

P

OINT

:

 

C

HILLER 

O

N

/O

FF

............................................................................................................................. 8 

C

ONFIGURING THE 

U

NIT 

C

ONTROLLER

.................................................................................................................................. 8 

TYPICAL APPLICATION: MINIMUM INTEGRATION

..................................................................................................... 9 

D

ISPLAY 

I

MPORTANT 

D

ATA 

P

OINTS

...................................................................................................................................... 9 

PROTOCOL POINT SUMMARY

....................................................................................................................................... 10 

R

EGISTER 

M

APPING

............................................................................................................................................................. 10 

A

LARM 

D

ATA 

P

OINTS

.......................................................................................................................................................... 16 

DETAILED DATA POINT INFORMATION

...................................................................................................................... 19 

A

CTIVE 

C

APACITY 

L

IMIT 

O

UTPUT

....................................................................................................................................... 19 

A

CTIVE 

S

ETPOINT

................................................................................................................................................................ 19 

A

CTUAL 

C

APACITY

.............................................................................................................................................................. 19 

A

LARM 

D

IGITAL 

O

UTPUT

.................................................................................................................................................... 19 

A

PPLICATION 

S

OFTWARE 

V

ERSION

...................................................................................................................................... 20 

C

APACITY 

L

IMIT 

S

ETPOINT 

-

 

N

ETWORK

.............................................................................................................................. 20 

C

HILLER 

C

APACITY 

L

IMITED

............................................................................................................................................... 20 

C

HILLER 

C

URRENT

.............................................................................................................................................................. 20 

C

HILLER 

E

NABLE 

O

UTPUT

................................................................................................................................................... 21 

C

HILLER 

E

NABLE 

S

ETPOINT

................................................................................................................................................ 21 

C

HILLER 

L

OCAL

/R

EMOTE

.................................................................................................................................................... 21 

C

HILLER 

L

OCATION

............................................................................................................................................................. 21 

C

HILLER 

M

ODE 

O

UTPUT

...................................................................................................................................................... 21 

C

HILLER 

M

ODE 

S

ETPOINT 

-

 

N

ETWORK

................................................................................................................................ 22 

C

HILLER 

M

ODEL

.................................................................................................................................................................. 22 

C

HILLER 

O

N

/O

FF

................................................................................................................................................................. 22 

C

HILLER 

S

TATUS

................................................................................................................................................................. 22 

C

LEAR 

A

LARMS 

-

 

N

ETWORK

................................................................................................................................................ 22 

C

OMPRESSOR 

D

ISCHARGE 

R

EFRIGERANT 

T

EMPERATURE

.................................................................................................... 23 

C

OMPRESSOR 

R

UN 

H

OURS

................................................................................................................................................... 23 

C

OMPRESSOR 

S

TARTS

.......................................................................................................................................................... 23 

C

OMPRESSOR 

S

UCTION 

R

EFRIGERANT 

T

EMPERATURE

........................................................................................................ 23 

C

ONDENSER 

R

EFRIGERANT 

P

RESSURE

................................................................................................................................. 24 

C

ONDENSER 

S

ATURATED 

R

EFRIGERANT 

T

EMPERATURE

..................................................................................................... 24 

C

OOL 

S

ETPOINT 

-

 

N

ETWORK

................................................................................................................................................ 24 

C

URRENT 

D

ATE 

&

 

T

IME

...................................................................................................................................................... 24 

Содержание McQuay MicroTech III

Страница 1: ... Data ED 15121 Group Controls Part Number ED 15121 Date October 2009 Supersedes New 2009 McQuay International MicroTech III Chiller Unit Controller Protocol Information Modbus Protocol Pathfinder Chiller Model AWS ...

Страница 2: ... POINTS 16 DETAILED DATA POINT INFORMATION 19 ACTIVE CAPACITY LIMIT OUTPUT 19 ACTIVE SETPOINT 19 ACTUAL CAPACITY 19 ALARM DIGITAL OUTPUT 19 APPLICATION SOFTWARE VERSION 20 CAPACITY LIMIT SETPOINT NETWORK 20 CHILLER CAPACITY LIMITED 20 CHILLER CURRENT 20 CHILLER ENABLE OUTPUT 21 CHILLER ENABLE SETPOINT 21 CHILLER LOCAL REMOTE 21 CHILLER LOCATION 21 CHILLER MODE OUTPUT 21 CHILLER MODE SETPOINT NETWO...

Страница 3: ...7 ALARMS 28 ALARM CLASSES 28 FAULT ALARMS 28 PROBLEM ALARMS 28 WARNING ALARMS 28 ALARM HANDLING 28 ALARM DIGITAL OUTPUT 28 CLEAR ALARMS NETWORK 29 ACTIVE ALARMS 29 APPENDIX A ASCII CHARACTERS CONVERSION TABLE 33 INDEX 34 TABLE OF TABLES Table 1 Valid Function Codes 6 Table 2 Valid Error Codes 7 Table 3 Significant Data Points 9 Table 4 Chiller Data Points 10 Table 5 Circuit Data Points 14 Table 6 ...

Страница 4: ...rosoft Corporation MicroTech III is a registered trademark of McQuay International Revision History ED 15121 October 2009 Preliminary release Software Revision This edition documents all versions of the standard MicroTech III Chiller Unit Controller firmware and all subsequent revisions until otherwise indicated Reference Documents Company Number Title Source McQuay International IM 969 MicroTech ...

Страница 5: ... description AWS Air Cooled World Screw Controller Data Points The MicroTech III Chiller Unit Controller contains data points or unit variables that are accessible from two different user interfaces the unit keypad display or a Modbus serial network Not all points are accessible from each interface This manual lists all important data points and the corresponding network path for each applicable i...

Страница 6: ...sion the reply to the client includes and exception function code and the response data field contains an exception code Controllers can communicate on standard Modbus networks using one of two transmission modes ASCII or RTU Users select the serial port communication parameters baud rate parity mode etc during configuration of the controller The mode and serial parameters must be the same for all...

Страница 7: ...t included in the address field of a Modbus message The Modbus Communication Module supports zero based addressing For example holding register 40003 is addressed as 0002 in a Modbus message Modbus Data Point Each data point accessible from a Modbus network is described with a table that gives the data type and holding register If the data point represents an enumerated variable the enumerations a...

Страница 8: ... in Modbus PDUs to specify the location the data in the unit controller This means for example that data element number 1 ie holding register 40001 is addressed using index 0 in the PDU In addition the function code field portion of the message already specifies a holding register operation Therefore the 4xxxx reference is implicit This document follows this assumption and has published the holdin...

Страница 9: ...etpoints No Alarms 1 Chiller Status 22 5 Evaporator Entering Fluid Temperature 25 9 Cool Setpoint Network 24 11 Warning Alarm Code 27 2 Chiller Mode Setpoint Network 22 6 Evaporator Leaving Fluid Temperature 25 10 Capacity Limit Setpoint Network 20 12 Problem Alarm Code 26 3 Actual Capacity 19 13 Fault Alarm Code 26 4 Chiller Enable Setpoint 21 14 Clear Alarms Network 29 You can display any number...

Страница 10: ... F 9 4 C to 65 5 C Actual Capacity 3 19 13 R 0 100 Active Capacity Limit Output 19 14 R 0 100 Chiller Status Chiller Run Mode 1 22 15 R 1 Off 2 Start 3 Run 4 Pre Shutdown 5 Service Evaporator Entering Fluid Temperature 5 25 16 R 40 230 F 40 110 C Evaporator Leaving Fluid Temperature 6 25 17 R 40 230 F 40 110 C Outdoor Air Temperature 26 24 R 40 230 F 40 110 C Chiller Current 20 25 R 0 10 000 Amps ...

Страница 11: ...2305 Bad demand limit input 2817 Unit power restore 3105 Circuit 1 failed pumpdown 3137 Circuit 2 Failed pumpdown 3169 Circuit 3 failed pumpdown 3201 Circuit 4 failed pumpdown 3329 External Event Problem Alarm Code 12 26 32 R 0 No Alarms 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 C...

Страница 12: ...gh Circuit 3 Comp 1 37255 COMP SHUTDOWN Condenser Pressure High Circuit 4 Comp 1 37671 COMP SHUTDOWN Discharge Temp Sensor Fault Circuit 1 Comp 1 37703 COMP SHUTDOWN Discharge Temp Sensor Fault Circuit 2 Comp 1 37735 COMP SHUTDOWN Discharge Temp Sensor Fault Circuit 3 Comp 1 37767 COMP SHUTDOWN Discharge Temp Sensor Fault Circuit 4 Comp 1 37927 COMP SHUTDOWN Discharge Temp High Circuit 1 Comp 1 37...

Страница 13: ...Circuit 2 Comp 1 44391 COMP SHUTDOWN Oil Feed Pressure Sensor Fault Circuit 3 Comp 1 44423 COMP SHUTDOWN Oil Feed Pressure Sensor Fault Circuit 4 Comp 1 45059 SHUTDOWN Phase Voltage Protection 45351 COMP SHUTDOWN Starter Fault Comp Circuit 1 Comp 1 45383 COMP SHUTDOWN Starter Fault Comp Circuit 2 Comp 1 45415 COMP SHUTDOWN Starter Fault Comp Circuit 3 Comp 1 45447 COMP SHUTDOWN Starter Fault Comp ...

Страница 14: ...Network 10 20 38 R W 0 100 Boldface indicates data points required for typical minimum integration Table 5 Circuit Data Points Network Control Property Page Holding Register 4xxxx Read Write Description Circuit 1 Condenser Refrigerant Pressure 24 39 R 0 410 psi 700 psi for R410A 0 2827 kPa 4826 kPa for R410A Condenser Saturated Refrigerant Temperature 24 40 R 14 98 185 F 26 1 85 C Evaporator Refri...

Страница 15: ... Run Hours 23 191 192 R W 0 999 999 Table 7 Pump Data Points Network Control Property Page Holding Register 4xxxx Read Write Description Evaporator Pump 1 Run Hours 25 303 304 R W 0 999 999 Evaporator Pump 1 Status 25 305 R 0 Pump Off Request 1 Pump On Request Evaporator Pump 2 Run Hours 25 306 307 R W 0 999 999 Evaporator Pump 2 Status 25 308 R 0 Pump Off Request 1 Pump On Request Table 8 Miscell...

Страница 16: ...2 0 Normal 1 Alarm 386 RESTART DELAYED Power Loss While Running Circuit 3 0 Normal 1 Alarm 387 RESTART DELAYED Power Loss While Running Circuit 4 0 Normal 1 Alarm 388 START INHIBITED Ambient Temperature Low 0 Normal 1 Alarm 390 INHIBIT LOAD Condenser Pressure High Circuit 1 0 Normal 1 Alarm 391 INHIBIT LOAD Condenser Pressure High Circuit 2 0 Normal 1 Alarm 392 INHIBIT LOAD Condenser Pressure High...

Страница 17: ...al 1 Alarm 545 COMPRESSOR SHUTDOWN Evaporator Pressure Low Circuit 1 Comp 1 0 Normal 1 Alarm 547 COMPRESSOR SHUTDOWN Evaporator Pressure Low Circuit 2 Comp 1 0 Normal 1 Alarm 549 COMPRESSOR SHUTDOWN Evaporator Pressure Low Circuit 3 Comp 1 0 Normal 1 Alarm 550 COMPRESSOR SHUTDOWN Evaporator Pressure Low Circuit 4 Comp 1 0 Normal 1 Alarm 552 COMPRESSOR SHUTDOWN Evaporator Pressure Sensor Fault Circ...

Страница 18: ...m 702 COMPRESSOR SHUTDOWN Suction Temperature Sensor Fault Circuit 3 Comp 1 0 Normal 1 Alarm 703 COMPRESSOR SHUTDOWN Suction Temperature Sensor Fault Circuit 4 Comp 1 0 Normal 1 Alarm 723 Controller board offline Circuit 1 Circuit number describes Control board number 0 Normal 1 Alarm 724 Controller board offline Circuit 2 Circuit number describes Control board number 0 Normal 1 Alarm 725 Controll...

Страница 19: ...rom the Cooling Setpoint Ice Setpoint or Heating Setpoint not available in MicroTech III Chiller Unit Controller See Chiller Mode Output and Chiller Mode Setpoint Network The default mode is Cool There are three possible setpoints See Cool Setpoint Network Heat Setpoint Network and Ice Setpoint Network Data Type Holding Register Measurement Units Valid Range RO Holding Register 12 Temperature F x ...

Страница 20: ... be adjusted above a factory specified limit The default is 100 This register is ignored by the chiller application if Chiller Local Remote is set to Local Data Type Holding Register Measurement Units Valid Range RW Holding Register 38 Percent of maximum capacity x 10 0 100 Chiller Capacity Limited Keypad Menu Path No Keypad Equivalent This read only holding register indicates whether conditions m...

Страница 21: ...d remotely over the network The value can only be changed locally The values from the following variables are ignored in the chiller application if this variable is set to Local 1 Chiller Enable Setpoint Chiller Mode Setpoint Network Cool Setpoint Network Ice Setpoint Network Capacity Limit Setpoint Clear Alarm Network Data Type Holding Register Measurement Units Valid Range RO Holding Register 1 ...

Страница 22: ...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 Units Valid Range RO Holding Register 8 Chiller State N A 0 Off 1 On Chiller Status Keypad Menu Path No Keypad Equivalent This read only holding register indicates the unit status of the chiller Data Type Holding Register Measure...

Страница 23: ... Range RW Holding Register Cir 1Cmp 1 74 75 Cir 2Cmp 1 113 114 Cir 3Cmp 1 152 153 Cir 4Cmp 1 191 192 Time Hours 0 999 999 Compressor Starts Keypad Menu Path Main Menu_View Set Circuit_ Circuit 1_Comp 1_No Of Starts OR Main Menu_View Set Circuit_ Circuit 2_Comp 1_No Of Starts OR Main Menu_View Set Circuit_ Circuit 3_Comp 1_No Of Starts OR Main Menu_View Set Circuit_ Circuit 4_Comp 1_No Of Starts Th...

Страница 24: ...ement Units Valid Range RO Holding Register Circuit 1 40 Circuit 2 44 Circuit 3 48 Circuit 4 52 Temperature F x 10 C x 10 14 98 185 F 26 1 85 C Cool Setpoint Network Keypad Menu Path Main Menu_View Set Unit_Status Settings_Netwrk Cool SP This read write holding register is used to change the Cooling setpoint from the network It sets the temperature of the Leaving Chilled Fluid when the chiller is ...

Страница 25: ...ding registers indicate the number of hours that the pump motor has been turned on There is separate holding register for each pump Pump 1 Data Type Holding Register Measurement Units Valid Range RW Holding Register 303 304 Time Hours 0 999 999 Pump 2 Data Type Holding Register Measurement Units Valid Range RW Holding Register 306 307 Time Hours 0 999 999 Evaporator Pump Status Keypad Menu Path No...

Страница 26: ...gister 33 Active Fault Alarm N A See the Active Alarms section on page 29 for details Fault Alarm Index Keypad Menu Path No Keypad Equivalent This read only holding register allows individual notification of the active fault index The alarms are not ordered based on any priority If multiple fault alarms are present at one time this object will be set to the alarm that has the highest alarm index T...

Страница 27: ...t Data Type Holding Register Measurement Units Valid Range RO Holding Register 3 Chiller State N A 0 Off 1 RunAllowed Units Keypad Menu Path No Keypad Equivalent This read write holding register allows you to select the units that are being passed through Modbus Data Type Holding Register Measurement Units Valid Range RW Holding Register 316 Units of Measure N A 0 English 1 Metric Warning Alarm Co...

Страница 28: ...ister is zero 0 the alarm is not active If the holding register is one 1 the alarm is active 2 To determine whether any alarm is active or not read the Alarm Digital Output register 40017 If the value of the holding register is zero 0 no alarms are active If the holding register is one 1 there is at least one active alarm 3 To monitor alarms by alarm class read the holding register for the appropr...

Страница 29: ...Units Valid Range RW Holding Register 10 NA N A 0 Normal 1 Clear Alarm 2 Null Active Alarms Tables 12 14 show the registers needed to read each individual alarm the alarm index and the alarm code Table 12 Modbus Warning Alarms Warning Alarms Alarm Class Monitoring Alarm Index Holding Register 28 Alarm Code Holding Register 31 Individual Alarm Monitoring Holding Registers 0 Normal 1 Alarm Alarm Des...

Страница 30: ... LOAD Condenser Pressure High Circuit 2 17250 392 INHIBIT LOAD Condenser Pressure High Circuit 3 67 17282 393 INHIBIT LOAD Condenser Pressure High Circuit 4 17698 395 UNLOAD Condenser Pressure High Circuit 1 17730 396 UNLOAD Condenser Pressure High Circuit 2 17762 397 UNLOAD Condenser Pressure High Circuit 3 69 17794 398 UNLOAD Condenser Pressure High Circuit 4 19490 411 INHIBIT LOAD Evaporator Pr...

Страница 31: ...3 Comp 1 147 37767 534 COMP SHUTDOWN Discharge Temp Sensor Fault Circuit 4 Comp 1 37927 535 COMP SHUTDOWN Discharge Temp High Circuit 1 Comp 1 37959 537 COMP SHUTDOWN Discharge Temp High Circuit 2 Comp 1 37991 539 COMP SHUTDOWN Discharge Temp High Circuit 3 Comp 1 148 38023 540 COMP SHUTDOWN Discharge Temp High Circuit 4 Comp 1 150 38403 542 UNIT SHUTDOWN Evaporator Water Flow Loss 151 38659 543 U...

Страница 32: ...nsor Fault Circuit 3 Comp 1 183 46983 703 COMP SHUTDOWN Suction Temp Sensor Fault Circuit 4 Comp 1 48131 746 Controller board offline Unit 48163 723 Controller board offline Circuit 1 Circuit number describes Control board number 48195 724 Controller board offline Circuit 2 Circuit number describes Control board number 48227 725 Controller board offline Circuit 3 Circuit number describes Control b...

Страница 33: ...4 D 68 0x44 d 100 0x64 37 0x25 E 69 0x45 e 101 0x65 38 0x26 F 70 0x46 f 102 0x66 39 0x27 G 71 0x47 g 103 0x67 40 0x28 H 72 0x48 h 104 0x68 41 0x29 I 73 0x49 I 105 0x69 42 0x2a J 74 0x4a j 106 0x6a 43 0x2b K 75 0x4b k 107 0x6b 44 0x2c L 76 0x4c l 108 0x6c 45 0x2d M 77 0x4d m 109 0x6d 46 0x2e N 78 0x4e n 110 0x6e 47 0x2f O 79 0x4f o 111 0x6f 0 48 0x30 P 80 0x50 p 112 0x70 1 49 0x31 Q 81 0x51 q 113 0...

Страница 34: ...frigerant Temperature 23 Compressor Run Hours 23 Compressor Starts 23 Compressor Suction Refrigerant Temperature 23 Condenser Refrigerant Pressure 14 24 Condenser Saturated Refrigerant Temperature 14 24 Cool Setpoint Network 14 24 Current Date Time 15 24 E Evaporator Entering Fluid Temperature 10 25 Evaporator Flow Switch Status 25 Evaporator Leaving Fluid Temperature 10 25 Evaporator Pump Run Hou...

Страница 35: ...35 ED 15121 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 ...

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