Here is a list of all documented variables with links to the struct/union documentation for each field:

dacCommand : heater_state
enabled : heater_state
fault : heater_state
faultType : heater_state
ramp : heater_state
rampStartTime : heater_state
rampStopTime : heater_state
rampTarget : heater_state
ready : heater_state
setpoint : heater_state