Honeywell AC-140-7, AC-220-7 manual Interface Overview, Home Screen, Using the LCD Panel Interface

INTERFACE OVERVIEW T775A/B/M SERIES 2000 CONTROLLER

INTERFACE OVERVIEW

The T775A/B/M controllers use 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.

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.

Left and Right Arrow Buttons (W and X)

Use these buttons to move backward (W) and forward (X) through the Program and Setup menus.

HOME

RELAYS 1 2 3 4

ON

SENSORS

SENSOR A

78 oF

SENSOR B

84 oF

MOD1	40%
MOD2	60%
DI ON
home	menu

MENU AREA

DATA AREA

LOCK ICON

6 BUTTON KEYPAD

M24488

Up and Down Arrow Buttons (S and T)

Use these buttons to move your selection up and down through a menu or list.

•When the desired item is highlighted, you press the X arrow button to display that item’s content.

•When a value is displayed (e.g. 70°F), 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 W or X 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.

Active relays are indicated by the small black square („) just below the relay number. Fig. 23 shows the home screen with relays 1, 2, and 4 energized.

Fig. 22. 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 and its order within the menu

Pressing the W and X buttons from the home screen cycles through each modulating output that is paired with the sensor it controls and the active output relays.

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 but- tons 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

HOME

RELAYS 1 2 3 4 ON

SENSORS

SENSOR A

78 oF

SENSOR B

84 oF

MOD1 40%

MOD2 60%

DI ON

HOME

RELAYS 1 2 3 4 ON

MOD 1 40%

COOL

SETPOINT

74 oF

SENSOR A

62 oF

MOD1 40%

MOD2 60%

DI ON

HOME

RELAYS 1 2 3 4 ON

REL 1	ON
HEAT
SETPOINT

60 oF

SENSOR A

62 oF

RT 12345 HRS

MOD1 40%

MOD2 60%

DI ON

M24489

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. 22 and Fig. 23.

Fig. 23. LCD Display - Home Screen Displaying Sensors, Active Relays, and Mod Outputs.

NOTE: 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 information is a snapshot taken when you press the W or X button to display the screen.

IMPORTANT

After four minutes of inactivity (no buttons pressed), the LCD display reverts to the home screen display.

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