AMX VST Instruction Manual page 35

Keypad Lockout Commands (Cont.)
Command
NETLK
Network Override (Hold) Lockout
UPDNLK
Temperature Change Lockout
ViewStat Communicating Thermostat - Programming Protocol Reference Guide
Description
ViewStat incorporates an ENTER button, which has three functions:
• User Interactive Thermostat Set-up: During thermostat set-up the user
interacts with the text messaging display to select various operational
parameters and this button is used to enter those selections.
• User Reset Message Resetting: When the thermostat receives a User
Reset Message command this button is used clear the message from
the text messaging display. During other times, this button is used to
override network control of the thermostat: temperature changes, mode
changes and fan state changes are controlled only by the buttons on the
thermostat.
• Network Override: When activated, "NETWORK OVERRIDE" shows on
the segmented display of the thermostat. The NETLK command effects
only the network override function.
There are two levels of user lockout associated with the HOLD or NET-
WORK OVERRIDE feature of the thermostat.
• The first, NETLK=0 represents no lockout at all and the user is allowed to
override networked operation freely (i.e. the Network Override feature is
enabled). This is the default setting.
• The second, NETLK=1 represents a total lockout (i.e. the Network
Override feature is disabled). During total lockout the thermostat user is
not allowed to override networked operation. Pressing the ENTER/
HOLD button on the thermostat will cause the "lock" icon on the
thermostat's segmented display to light. Releasing the button removes
the icon. This setting is stored in non-volatile memory, so on power loss
the current network lock setting will be retained.
Syntax:
SN[address] NETLK=0 or 1
Reply Format:
SN[address] NETLK =0 or 1
There are four levels of lockout associated with the ability to change the
temperature or humidity setting at the thermostat.
• The first, UPDNLK=0 represents no lockout at all. This is the default
setting.
• The second, UPDNLK=1 allows the user to change the temperature
setting, with no limit, for an amount of time determined by the LKTIME
value (see LKTIME command section). At the end of the time limit, the
settings will return to that which was set when the UPDNLK command
was received. Subsequent changes to the temperature/humidity
settings made at the thermostat will follow the same sequence.
• Third, UPDNLK=2 is the same as UPDNLK=1 except the user is allowed to
change the setting only by an amount specified by the LKLIMIT
command.
• Finally, UPDNLK=3 represents a total lockout. The temperature/humidity
settings will remain at their current value until the UPDNLK setting is
changed. Pressing the up or down button on the thermostat will cause
the "lock" icon on the thermostat's segmented display to light. Releasing
the button removes the icon. This setting is stored in non-volatile
memory, so on power loss the current temperature/humidity lock setting
will be retained.
Syntax:
SN[address] UPDNLK=0, 1, 2 or 3
Reply Format:
SN[address number] UPDNLK=0, 1, 2 or 3
ViewStat Programming Protocol
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