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T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
INTERFACE OVERVIEW
The T775R controller uses an LCD panel and 6-button
keypad to provide status information and permit user input
of the programming, setup, and scheduling parameters.
The following figure describes the display areas of the
LCD and the keypad.
HOME
RELAYS 1 2 3 4
ON
SENSORS
SENSOR A
78
SENSOR B
84
MOD1
MOD2
DI ON
home
menu
Fig. 20. LCD Display - Home Screen And Keypad.
Menu Area – On the home screen, the LCD displays the
configured relays and whether they are active. In
Program, Setup or Schedule mode, the LCD displays
the current menu selection within the menu hierarchy.
Data Area – On the home screen, the LCD displays the
sensors and outputs status. In Setup or Program
mode, the LCD displays menu choices, parameter
selections, and data values.
Lock Icon – The icon indicates the MENU button is
locked and prevents access to the Setup and Program
menus.
NOTE: Pressing and holding the HOME and MENU
buttons simultaneously for five seconds
locks/unlocks the MENU button.
6-Button Keypad – The keypad is used to access the
menus and enter values (See "Using the LCD Panel
Interface").
Using the LCD Panel Interface
The 6-button keypad is used to move through the menus
and enter or change parameter values.
Home Button
Pressing the HOME button at any time exits the current
Programming or Setup display screen and returns to the
home screen as shown in Fig. 20 and Fig. 21.
Menu Button
• Pressing the MENU button always displays the
Program menu. If you are in Setup mode, you exit
setup and return to the Program menu.
• Pressing and holding the MENU button for five
seconds leaves the current screen and displays the
Setup menu.
62-0249—13
MENU AREA
o
F
o
F
DATA AREA
40%
60%
LOCK ICON
6 BUTTON KEYPAD
M24298
Left and Right Arrow Buttons (
Use these buttons to move backward () and forward ()
through the Program and Setup menus.
Up and Down Arrow Buttons (
Use these buttons to move your selection up and down
through a menu or list.
• When the desired item is highlighted, you press the
arrow button to display that item's content.
• When a value is displayed (e.g. 70°F (82° C)), the up
and down arrows increase and decrease the value.
NOTE: Once you select an item from a list or enter a
value, pressing the or or HOME button
accepts your selection or value and stores it
in the controller's memory.
Home Screen
In the normal run state, the LCD home screen displays
the current sensed temperatures, the modulating outputs
status, the active status of the output relays, and error and
status codes.
When using Reset, the Heat/Cool setpoint(s) display on
the home screen for the Mod and Relay outputs; (See Fig.
21).
Active relays are indicated by the small black square ()
just below the relay number. Fig. 21 shows the home
screen with relays 1, 2, and 4 energized.
Pressing the and buttons from the home screen
cycles through each modulating output that is paired with
the sensor it controls and the active output relays.
HOME
RELAYS 1 2 3 4
ON
SENSORS
SENSOR A
78
o
F
SENSOR B
84
o
F
MOD1
40%
MOD2
60%
DI ON
Fig. 21. LCD Display - Home Screen Displaying
Sensors, Mod Outputs, and Active Relays.
NOTES:
1.
The modulating output home screen and the
relay home screen do not dynamically update
the active relay status, sensor values, and
modulating output percentages. The informa-
tion is a snapshot taken when you press the
or button to display the screen.
2.
In Reset mode, the home screen displays the
effective setpoint.
IMPORTANT
After four minutes of inactivity (no buttons
pressed), the LCD display reverts to the home
screen display.
10
and
and
HOME
RELAYS 1 2 3 4
RELAYS 1 2 3 4
ON
MOD 1
40%
REL 1
COOL
HEAT
SETPOINT
SETPOINT
74
o
F
SENSOR A
SENSOR A
62
o
F
RT 1476 HRS
MOD1
40%
MOD1
MOD2
60%
MOD2
DI ON
DI ON
)
)
HOME
ON
ON
60
o
F
62
o
F
40%
60%
M24299
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