Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE - Manual (Page 128)

7-4 OPERATOR INTERFACE TERMINAL PV-550 REV E
1557-UM050F-EN-P – June 2013
Cursor (Selection) Keys
The cursor keys are normally used to select an item on the display. When an item on the display
is selected, that item will be displayed in reverse video. To change the selection, press the key in
the desired direction.
On selection screens which have more then one page, the page will automatically change when
the cursor is moved beyond the displayed list.
Some displays such as the Utility screen, use these keys to modify the data value. Pressing the
[cursor up] and [cursor down] keys will change the value by a fine amount, ie. 1 unit. Using the
[cursor left] and [cursor right] keys will change the value by a course amount, ie. 10 units.
For entries requiring a HEX value, the keys (cursor up/down) are used to scroll to the desired HEX
value.
All four cursor keys have an auto feature such that after holding the key for 2 seconds, the key will
automatically repeat at a rate of 5 „presses‟ per second.
Data Entry Keys
As the name implies, these keys are used to enter data. Pressing the keys [0] to [9] will enter the
corresponding value into the 'editing field'. Pressing the [-] key will change the value to a negative
number. Pressing the [.] will allow a fractional value to be entered.
While entering a value, the value may be edited using the [backspace] key. This key will remove
the right most digit (or decimal point or negative). The help screen uses the backspace key to
return to the previous level of help.
The enter key varies depending on the screen. If you are in the process of a selection operation,
the enter key will accept the selection and proceed to a different screen based on the selection in
order to complete the operation. If you are in the process of entering data, the enter key will
accept the edited data.
What is a Screen?
The terminal uses menu driven screens to perform various operations on the drive. You can think
of a screen as a window or template, overlaying data from the drive. The terminal combines a
screen with the drive data, to formulate what you see on the display area of the terminal.
Individual screens display a particular type of data and allows selected operations to be performed
on this data. A number of different screens may be used while performing a single operation.
Components
Although the data displayed on any particular screen will vary, the general makeup of a screen is
the same for all. Figure 2 shows a typical screen.