Table of Contents
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Data Packet..............................................................................................................................................................34
The Query.................................................................................................................................................................35
The Response...........................................................................................................................................................35
Data Field..................................................................................................................................................................35
Error Checking..........................................................................................................................................................35
ASCII..................................................................................................................................................................35
RTU...................................................................................................................................................................35
Framing.....................................................................................................................................................................36
ASCII..................................................................................................................................................................36
RTU...................................................................................................................................................................36
ASCII Query (Read) Example......................................................................................................................................37
ASCII Write Example................................................................................................................................................38
ASCII Response Example..........................................................................................................................................40
RTU Query (Read) Example.......................................................................................................................................41
RTU Response Example............................................................................................................................................41
Modbus® Notes.......................................................................................................................................................42
Modbus® Data Access............................................................................................................................................42
SECTION 5
HYPERTERMINAL.................................................................................................................................................43
Description...............................................................................................................................................................43
Setting up Hyperterminal..........................................................................................................................................43
Testing Communications...........................................................................................................................................45
General Notes...........................................................................................................................................................46
Conversion Chart For Decimal / Hexadecimal / ASCII................................................................................................47
SECTION 6
QUANTUM™ LX DATA TABLES..............................................................................................................................49
Digital Board Values..................................................................................................................................................50
Analog Board Values.................................................................................................................................................51
Calculated Values......................................................................................................................................................52
Mode Values..............................................................................................................................................................53
Warnings/Shutdown Values.......................................................................................................................................67
Timer Values.............................................................................................................................................................70
Setpoint Values.........................................................................................................................................................71
Commands................................................................................................................................................................85
SECTION 7
WARNING/SHUTDOWN MESSAGE CODES.............................................................................................................87
SECTION 8
Q5 CONTROLLER..................................................................................................................................................89
Main Board History And Identification.......................................................................................................................90
Communications Connector Locations......................................................................................................................90
SERIAL COMMUNICATIONS HARDWARE...............................................................................................................91
General Description...................................................................................................................................................91
COM-1 and COM-2 Description.................................................................................................................................91
COM-3 Description....................................................................................................................................................91
COM-4 Description...................................................................................................................................................91
SERIAL COMMUNICATIONS PORT WIRING............................................................................................................92
General Note.............................................................................................................................................................92
RS-232 Wiring And Jumpers.....................................................................................................................................92
RS-422/485 Wiring And Jumpers...............................................................................................................................92
RS-422 Signal Wiring.........................................................................................................................................92
RS-485 Signal Wiring.........................................................................................................................................92
SERIAL COMMUNICATIONS TROUBLESHOOTING...................................................................................................93
Troubleshooting RS-232............................................................................................................................................93
Troubleshooting RS-422...........................................................................................................................................93
Troubleshooting RS-484...........................................................................................................................................93
COMMUNICATIONS DATA LOGGING SCREENS.......................................................................................................95
Communications Log.................................................................................................................................................95
Modbus TCP Log........................................................................................................................................................95
QUANTUM™ LX AcuAir™ CONTROL PANEL
090.510-CS (DEC 2012)
Page 3
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Table of Contents
Troubleshooting
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