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UGH004/0999 CHILLER SPI COMMANDS
APPENDIX B-3
Status, Machine 1
Poll: 0x21 0x42
SPI STATUS WORD
Word BIT position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
EEprom error SET SET
*
A/D converter error SET SET
*
CJC Error SET SET
*
RAM hardware SET SET
*
ROM checksum SET SET
*
Probe Failure
*
E/M Hi temp safety SET SET SET
*
Prog. Hi temp safety SET SET SET
*
Output monitor failure SET SET
*
Low water pressure SET SET SET
*
High deviation alarm
*
Low deviation alarm
*
Prog. Lo temp safety SET SET SET
*
Pump overload SET SET
*
Refrig. Pressure SET SET
*
Oil Safety SET SET
*
Compressor overload SET SET
*
Freeze Stat SET SET
*
Low water level SET SET
*
Test Mode
*
Phase error SET SET SET
*
NOTES:
*
The SPI I/O list defines the Processing bit as being cleared if the unit is not processing; otherwise it is SET.
Elsewhere on the chart:
● If a bit is not shown to be SET, it is cleared.
● The System Alarm bit is SET if an alarm is present. It is the logical OR of Process alarm and Machine alarm.
● Processing, System Alarm, Process Alarm and Machine Alarm bits are repeated for Process Status, Machine 1
Status and Machine 2 Status.
SPI STATUS WORDS
Open
Alarm, Phase
Alarm, Low current
Alarm, High current
Alarm, Low volts
Alarm, High volts
Reserved
Reserved
Alarm, Low pressure safety limit
Alarm, High pressure safety limit
Alarm, Low temperature safety limit
Alarm, High temperature safety limit
Alarm, Machine
Alarm, Process
Alarm, System
Processing