User manual AMX VIEWSTAT PROGRAMMING PROTOCOL REFERENCE GUIDE

[. . . ] instruction manual ViewStat Programming Protocol Reference Guide H VA C C o n t r o l s AMX Limited Warranty and Disclaimer AMX Corporation warrants its products to be free of defects in material and workmanship under normal use for three (3) years from the date of purchase from AMX Corporation, with the following exceptions: · · · · · Electroluminescent and LCD Control Panels are warranted for three (3) years, except for the display and touch overlay components that are warranted for a period of one (1) year. Disk drive mechanisms, pan/tilt heads, power supplies, MX Series products, and KC Series products are warranted for a period of one (1) year. Unless otherwise specified, OEM and custom products are warranted for a period of one (1) year. Software is warranted for a period of ninety (90) days. [. . . ] ViewStat responds with the temperature in the scale defined by the SCALE command and appends a C or F to the value for clarity. Should no sensor be attached the value will show "- -". This is the temperature value shown on the lower left of the thermostat display and is the value used for high and low balance point control (for heat pump use only). The alternate command and reply formats have been implemented to maintain backward compatibility with earlier thermostat versions. Reply Format: SN[address] OT={value}F or C Alternate Syntax: SN[address] R?Alternate Reply Format: SN[address] R={value}F or C OH Thermostat Remote "Outdoor" Humidity Up to four addressable support-modules can be connected to a thermostat's local communication network (LCN). Two sensors can be connected to each support module; each can be a temperature sensor or a humidity sensor depending on the support module model. Each sensor can be individually configured as control sensors or remote sensors (for display only). The humidity sensor configured to be "remote" of the support module with address #1 is the source of remote humidity. ViewStat responds with the humidity value appended by a "%" for clarity. Should no sensor be attached the value will show "- -". This is the humidity value shown on the lower left of the thermostat display. Reply Format: SN[address number] OH={value}% ViewStat Communicating Thermostat - Programming Protocol Reference Guide 17 ViewStat Programming Protocol Thermostat HVAC Operational Commands These commands are used for temperature control and other thermostat operational parameters. The following command descriptions describe the use of the command when setting a particular variable. Inquiries can be made with all commands (with the exception of the SCUP, SCDN, BLTON and ENTR commands) to determine the existing value of a variable. Inquiry is done using the following syntax: SN [address number, or <blank> or 0 (zero) for global] "COMMAND" ? where COMMAND is the variable whose value is desired. Thermostat Action Commands Command SH Temperature Setting - Heat Description The heat setting is the temperature setting against which the current room temperature is compared to control the heating outputs of the thermostat. The value is assumed to be in the temperature scale set using the SCALE command. If the integer value is outside the allowable range for the set temperature scale the command will be ignored. Syntax: SN[address] SH={value} Parameters: · {value}: Integer value between 40 and 88 if SCALE is set to °F or between 4 and 31 if SCALE is set to °C. Reply Format: SN[address number] SH={value}F or C depending on set temperature scale SH++/SH -Increment Or Decrement Temperature Setting - Heat These commands are used to raise (SH++) or lower the (SH--) the heat temperature setting by a specified value. The value is assumed to be in the temperature scale (F or C) set using the SCALE command and the response will include a scale designator. [. . . ] This command is used to read whether or not the backlighting of a thermostat is in the ready state. If the corresponding change of state command has been turned on (C12 - see Change of State command section) this information is automatically sent to the host. Reply Format: SN[address] BLREADY=0 (not ready) or 1 (ready) ViewStat Communicating Thermostat - Programming Protocol Reference Guide 33 ViewStat Programming Protocol Auxiliary Information Commands (Cont. ) Command BLTRIG Backlight Trigger Description A photosensor is integrated on the thermostat circuit board to put the display backlighting (both the segmented display and the text messaging display) in a ready state depending on the intensity of the ambient light. This command is used to select a relative intensity. [. . . ]