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Heatcraft Mohave User Manual

Heatcraft Mohave
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71
Heatcraft Mohave Control Modbus Definitions
Heatcraft Mohave Control Rev. 17
10/4/2016
ModBus Definitions
NOTE: For this device, ModBus message frames must be no larger that 256 bytes
NOTE: For ModBus commands, temperatures are always degrees F, pressures
are always psia, and times are always 24-hour HHMM
Discrete Inputs -
CMD 0x02 (Read)
Input Address Byte Addr. Bit Addr.
"Enter" pushbutton
000
"Clear/Test" pushbutton
101
"Program Review" pushbutton
202
"Force Service" pushbutton
303
"Monitor" pushbutton
404
"Force Defrost" pushbutton
505
"Reset Time" pushbutton
606
Service Switch contacts
707
Safety Switch contacts
810
CU Suction Pressure switch contacts
911
T-Stat contacts 10 1 2
BeaconII I/F current sense 11 1 3
Remote Defrost switch contacts 12 1 4
Coils -
CMD 0x01 (Read), CMD 0x05 (Single Write)
Coil Address
Byte Addr. Bit Addr.
CMD 0x0F (Multiple Write)
Beacon "Low Pressure Switch" output
000
Evaporator Heater relay
101
Liquid Line Solenoids relay
202
Evaporator Fan relay
303
Condenser Fan 4 relay
404
Condenser Fan 3 relay
505
Condenser Fan 2 relay
606
Condenser Fan 1 relay
707
Alarm relay
810
Compressor relay
911
Bypass Valve relay
1012
Suction Solenoid relay
1113
Defrost Solenoid relay
1214
3-Way Valve relay
1315
Input Registers -
CMD 0x04 (Read)
Data Type
Word Addr. Label
Suction Temperature (-55 to +125 degrees F) Word, signed 0
SucT
Ambient Temperature (-55 to +125 degrees F) Word, signed 1
AMBT
Auxilliary Temperature (-55 to +125 degrees F) Word, signed 2
AUXT

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Heatcraft Mohave Specifications

General IconGeneral
BrandHeatcraft
ModelMohave
CategoryIndustrial Equipment
LanguageEnglish