User Guide

ViewStat Programming Protocol
6
ViewStat Communicating Thermostat - Programming Protocol Reference Guide
Programming Quick Reference
All of the commands are summarized in the following list. A detailed description of each
command follows the table. Unless otherwise noted as "Read Only" or "Write Only", all
commands are "Read and Write".
Programming Quick Reference
Command Description Value
Communication Control Commands
CR Command Response Control Silent / Quiet / Normal
C1 Change of State (COS) - HVAC relays ON/OFF
C2 COS - Temperature ON/OFF
C3 COS - Remote Temperature ON/OFF
C4 COS - Contact Closures ON/OFF
C5 COS - Set Points ON/OFF
C6 COS - Network Override ON/OFF
C7 COS - Mode ON/OFF
C8 COS - Fan ON/OFF
C9 COS - Scroll Up activation ON/OFF
C10 COS - Scroll Down activation ON/OFF
C11 COS - Enter Button activation ON/OFF
C12 COS - Backlight Ready ON/OFF
CP Command Configuration Pattern 1 / 2
HOLD User Hold Status ON / OFF
NAME Location Name <String>
ID Report Model No. and software rev. Read Only
BAUD Specifies thermostat communication baud
rate.
9600, 19200
Thermostat Sensing Commands
SCALE Command Temperature Scale F / C (Fahrenheit/Celsius)
CT Controller Type; Temperature or Humidity. Set
to Humidity only when auxiliary humidity con-
trol sensor is detected.
• 0 = Temperature controller
• 1 = Humidity controller
Read Only
TEMP, T Report Thermostat Room Temperature Read Only
HUM Report Thermostat Room Humidity Read Only
RSM Identify all remote sensors connected to a ther-
mostat's local communication network
Read Only
RxSy
(x = 1-4;
y = 1,2)
Report value of any sensor on thermostat's
local communication network
Read Only
OT Report Thermostat Remote (outdoor) Temper-
ature
Read Only
R Report Thermostat Remote (outdoor) Temper-
ature
OH Report Thermostat Remote Humidity Read Only
(Cont.)