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GE Digital EnergyMultilin HandHeld Display (HHD)
Source: | Author:kongjiang | Published time: 2026-09-15 | 50 Views | 🔊 Click to read aloud ❚❚ ▶ | Share:
GE Digital EnergyMultilin HandHeld Display (HHD)The HHD includes a rugged enclosure which suits the requirements of on-site remote use. The unit also includes industrial-strength magnets that allow the HHD to be temporarily mounted on the LV MCC while accessing the relay.

 HandHeld Display

The HHD provides the operator with rapid access to relevant information and controls using intuitive sequences. It also provides all available information and setting control with an easy-to-use graphic interface.

The HHD includes a rugged enclosure which suits the requirements of on-site remote use. The unit also includes industrial-strength magnets that allow the HHD to be temporarily mounted on the LV MCC while accessing the relay.

Introduction to the HHD

The central feature of the HHD is a 3.5-inch 320 by 240 pixel backlit color LCD screen. The panel also contains keys (pushbuttons) that control the display and perform commands. In addition, the interface contains START A, START B, and STOP direct-acting control pushbuttons.
The display also contains several LED indicators that provide a summary of the machine status. Details are displayed on the screen when the user navigates to the appropriate page.
HHD display
Each display page consists of the three components shown below.
The header bar (white text on a blue background) displays the hierarchical path name, the date and time in 24-hour format, and the current password access level. The hierarchical path is always displayed on the top-left side of the graphical display. The present time is displayed on the top right side. If the test switch is on, the time is replaced with the text in red.
The soft-key labels are indicated on the bottom line. The soft-keys are used for navigation,
performing functions, and for acknowledgement.
•Navigation: soft-keys can be used to traverse across and down the hierarchy of pages.
•Functional: soft-keys can be used to perform page-specific functions.
•Acknowledgement: soft keys can be used to acknowledge pop-up windows.
Soft-key labels change to show relevant selections for the displayed screen. The color of each soft-key label indicates its functionality. Soft-keys are highlighted for the displayed page, unauthorized keys are "greyed-out", and unused keys are not displayed.
The remainder of the screen shows the selected page. Pages are organized in a hierarchical or tree-based menu structure. To improve readability, some pages are labeled with rectangular outlines or colored backgrounds. Some pages contain too many fields to display at once. These pages display arrow bars at the right edge to indicate that the page continues below the screen. When recalled, scrolled pages are re-positioned at the
top of the page.
Fields display actual value or setting information, and have behaviours that allow help display, editing, and control.
Each Actual Value analog field displayed on the home page has an associated alarm limit and changes color to orange when that limit is exceeded. Fields with an associated trip limit change their color to red when that limit has tripped. Fields that are disabled or unavailable are greyed out.
Keypad
The function keys perform the labeled functionality. The summary of function key operation is shown below.
The HOME key always recalls the root or home page. The home page allows access to all sub-pages and also contains a status and process values summary. Double-pressing the HOME key recalls the default display. Like a screen-saver, the default display appears after a period of inactivity and displays user-selected information. A typical default display is shown below, indicating a running motor in the forward direction.
The UP and DOWN keys function in different ways depending on their context.
•Where a scroll bar is displayed, the UP and DOWN keys scroll the page up and down.
•Where there is no scroll bar, or it is greyed-out, the first press of the UP and DOWN keys selects the first field. Subsequent presses tab up and down through the fields, scrolling as required.
•When a field is open for editing, the UP and DOWN keys increment/decrement the value of that field.
The ENTER key functions in different ways depending on its context.
•If there are no selected fields, the ENTER key will freeze any scroll bars and select the first field on the display.
•If a field is selected, pressing ENTER will attempt to open it for editing.
•If a field is opened for editing, pressing ENTER will exit the edit sequence.
• Double-pressing the ENTER key at any time selects the displayed page as the default display.
•A sustained press of ENTER prompts the security passcode and displays a dialog box that allows passcode entry.
For example, pressing and holding the ENTER key, or attempting a control where a password is required, displays the following page.
The ESC key functions in different ways depending on its context.
•If a pop-up dialog box is displayed, the ESC key closes it.
•If an edit sequence is in progress, the ESC key cancels the edit.
•If a field is selected, the ESC key de-selects it.
•In all other instances, the ESC key moves back one page in the menu structure.
•A sustained press of the ESC key clears the security passcode and prompts for
confirmation.
The HELP key functions in different ways depending on its context.
•If a field is selected, the HELP key displays a help window for the field.
•If a help window is displayed, the HELP key closes it.
Help windows are also closed when any other key is pressed. A typical help window is shown below.
Typical HHD help window
Pressing an invalid key displays a message explaining the problem and recommending a solution. Where the keypress is invalid because a security passcode is required, the dialog window will be a passcode entry window.
When a lockout occurs that clears when a countdown timer expires or when the thermal capacity recovers for a restart, the Status > Message page is displayed, indicating the timer value or thermal capacity.
Control keys
The HHD has three large direct control keys: START A, START B, and STOP.
•STOP: The STOP key allows the user to stop the motor directly from the HHD. Pressing
this key causes the contactor A and contactor B output relays to de-energize,
therefore dropping out the motor contactor.
•START A and START B: Pressing these keys initiates the programmed start sequence.
The START A and START B keys are used to start the motor from the HHD (if MCC.
control is enabled). The START A and START B sequences can also be initiated via
communications, field control, or hardwired input
LED indicators
The control panel LEDs summarize the status of the device and up to three user-programmable parameters. The LED colors can be independently configured by the user to display either red, orange, or green, as required by local operating conventions. The following LEDs are available for the HHD.
•Running LED: Indicates that the motor is running. It will be on whenever the contactor A or B relays are closed, and the contactor status inputs acknowledge the correct state. Current flow does not affect the indicator.
•Stopped LED: Indicates that the motor is stopped based on both contactors A and B being de-energized.
• Tripped LED: Indicates that the A and B contactor relays are de-energized. The motor cannot be restarted as long as this indicator remains on.
• Alarm LED: Indicates that an alarm condition is present.
•Auto LED: Indicates if the MM300 is in auto control mode.
•Manual LED: Indicates if the MM300 is in manual control mode.
•Comms OK LED: Indicates the status of selected communication interface activity. The user can select an individual or a combination of communications interfaces by configuring the "Comms OK Evaluation" (Modbus address 40517, 0204H) setpoint, under homesetpointsconfigureComms. If all interfaces are communicating, then the LED is green. If all interfaces have failed, then the LED is red. If one or more, but not all, interfaces are failed, then this LED is orange.
•User 1 to User 3 LEDs: These LEDs can be programmed by the user to indicate any digital condition.