Qualitrol 118 ITM Series Instruction Manual page 36

Appendix G Modbus Communications
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40009 Phase Status
NOTE: Since all sensors are normally enabled,
This register will normally be 0000H.
40010 Fan set point
40011 Alarm set point
40012 Trip set point
40013 Fan switching differential (hysteresis)
40014 Alarm switching differential (hysteresis)
40015 Trip Switching differential (hysteresis)
40016 Fan Exerciser interval
40017 Fan Exerciser run time
40018 Time since last Fan Exercise
40019 Firmware Version
40020 Auxiliary Relay 4 set point
40021 Auxiliary Relay 5 set point
40022 Auxiliary Relay 4 switching differential (hysteresis)
40023 Auxiliary Relay 5 switching differential (hysteresis)
48188 Device I.D.
Modbus
Register Data Sent To Addressed Register
40050 Set Manual Fan Function ON/OFF
40051 Reset Max stored temperature
40052 Reset Unit
40053 Buzzer Control
Courtesy of NationalSwitchgear.com
Bit 4 "1" = Failed Display Driver
Bit 0 "1" = Some other bit is '1'
Bit 1 "1" = Left phase disabled
Bit 2 "1" = Center phase disabled
Bit 3 "1" = Right phase disabled
Bit 4 "1" = Left phase has a Failed Sensor
Bit 5 "1" = Center phase has a Failed Sensor
Bit 6 "1" = Right phase has a Failed Sensor
Bit 7 "1" = Fan Exerciser is disabled
Setpoints and switching differentials are 8-bit data
in the low-order byte.
1 to 720 hours (up to 30 Days)
1 to 120 minutes
1 to 720 hours (up to 30 Days)
Setpoints and switching differentials are 8-bit data
in the low-order byte.
15060D (15060 - 15069 reserved for ITM
0001 turns Fan ON, 0000 sets Fan to AUTO
0001 sets max temp stored to current max temp.
0001 resets the unit.
0001 turns ON Buzzer, 0000 turns Buzzer OFF
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