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McQuay Micro Tech Open Protocol Driver Manual Page 18 of 35
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Appendix A.2. Data Field Name Tables
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If you do not know the field name it is possible to read the device by specifying the address only.
More information is provided in Appendix A.4
Table 2 – Equipment Type: 200CFC 200 Series Centrifugal Chiller
Array
Location
Read/
Write/
Both
Field Name
Number
of Bytes
Base
Address
Device
Scaling
Method
5
1 r Model 3 0x0A08
1
4 r Refrigerant 1 0x0A0B
1
5 r Units of Measure 1 0x0A0C
1
6 r Software Version 2 0x0A0D
1
8 r Software Revision 1 0x0A0F
1
11 r Chiller Unit Temperature Type 1 0x084B
1
12 r Communication Status 1 0x040C
1
13 r Compressor Lift Pressure 2 0x046A
2
15 r Compressor Motor Current 2 0x044C
1
17 r Compressor Motor Current Percent 1 0x044A
1
18 r Compressor Number of Starts 2 0x085F
1
20 r Compressor Operating Hours 2 0x0851
1
22 r Compressor Suction Temperature 2 0x043A
3
24 r Compressor Superheat - Discharge 2 0x046E
2
26 r Compressor Superheat -Suction 2 0x046C
2
28 r Condenser Approach Temperature 2 0x0484
2
30 r Condenser Heat Recovery Unit Present
1 0x083F
1
31 r Condenser Heat Recovery Temperature -
Delta
2 0x048A
2
33 r Condenser Heat Recovery Water Temp. -
Entering
2 0x0454
3
35 r Condenser Heat Recovery Water Temp. -
Leaving
2 0x0456
3
37 r Condenser Pump Status 1 0x0425
1
38 r Condenser Pump # 1 Operating Hours
2 0x085A
1
40 r Condenser Pump # 2 Operating Hours
2 0x085D
1
42 r Condenser Refrigerant Pressure 2 0x0440
2
44 r Condenser Refrigerant Temperature 2 0x0466
3
46 r Condenser Subcooling Temperature 2 0x0480
2
48 r Condenser Water Flow Rate 2 0x0452
1
50 r Condenser Water Flow Status 1 0x045F
1
51 r Condenser Water Rate Sensor 1 0x083D
1
52 r Condenser Water Temperature - Delta
2 0x0488
2
54 r Condenser Water Temperature -
Entering
2 0x0436
3
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Additional information may be obtained from McQuay International. Request the following document.
MicroTech® Series 200 Centrifugal Chiller Data Communications Packet for Open Protocol™
Cent2_22.doc
5
See Appendix A.1.