AMX ENV-VST-C - Manual (Page 33)

Programming
27 ViewStat Color Communicating Thermostat
AxLink Levels
Each AXLink device contains 8 levels numbered 1-8. Levels are a means of applying a value to a
physical element on the device.
When a device is online for the first time, the Master assumes the device is at the default level status with
all levels set to 0. However, the thermostat may not be in this default state and needs to tell the Master
the value of any non-zero level. After a 'LEVON' command is received from the Master, the thermostat
sends a level update for any levels that are non-zero.
If the level represents a temperature, then the level value is equivalent to the degree reading plus 120.
The temperature reading is reported in the set temperature scale, F or C. For example, if the temperature
scale is F and the temperature reading is -10 then the level value would be 110. If the temperature scale
is C and the temperature reading is 25 then the level value would be 145.
If the level represents a humidity reading, then the level value is equivalent to the humidity reading. The
valid range of a level associated with a humidity reading is 0-100. Therefore, levels with values between
0-100 are valid representing humidity readings of 0% to 100%, and level values from 101-255 are
invalid.
In the Level table below, Type column denotes who initiates the level change. The Master directs the
thermostat to change its state through Level of type CMD. The thermostat informs the Master of state
changes through Levels of type FDBK.
AxLink Channels (Cont.)
Channel Type Function Description
227 FDBK HVAC Emergency Heat
Status Feedback, HVAC Emergency Heat Status
changed
Channel ON: Emergency Heat is On,
Channel OFF: Emergency Heat is Off.
228 CMD Humidify State Auto Set the humidify state to auto while the
channel is active, ON.
229 CMD Humidify State Dehumidify Set the humidify state to dehumidify while
the channel is active, ON.
230 CMD Humidify State Humidify Set the humidify state to humidify while the
channel is active, ON.
231 CMD Humidify State Off Set the humidify state to off while the
channel is active, ON.
232 FDBK Dehumidify Status Feedback, Dehumidify Status changed
Channel ON: Dehumidifier is On,
Channel OFF: Dehumidifier is Off.
233 FDBK Humidify Status Feedback, Humidify Status changed
Channel ON: Humidifier is On,
Channel OFF: Humidifier is Off.
234-255 Not Used