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9
SYSTEM KEYBOARDS - LTC 8554
SERIES, LTC 8555 SERIES
The various system keyboard displays and functions for the LTC
8554/00 and LTC 8555/00 are described herein. Refer to the
applicable keyboard diagrams as needed. The LTC 8554/01 and
LTC 8555/01 utilize ICON characters in lieu of English text.
LTC 8554/00 Keyboard
LTC 8555/00 Keyboard
9.1
Keyboard Displays
9.1.1 Monitor Display
The monitor display is a three-digit seven-segment display that
serves two purposes. One purpose is to display the number of the
monitor that the keyboard is currently controlling. This monitor's
camera number appears in the camera display, and the pan and
tilt keys control camera movement if applicable. The second
purpose is to provide a prompt to a user to log-on to the system if
the log-on feature was enabled by the system installer. Once the
user has logged on, the display reverts to the monitor number.
9.1.2 Camera Display
The camera display is a four-digit seven-segment display. It shows
the number of the camera being viewed on the monitor that the
keyboard is controlling. However, there are three modes for this
display. The camera mode is the default, but when the user
pushes one of the numeric data keys, this display shows the
numeric keystrokes as they are entered from the keyboard and
also causes the decimal point in the lower right hand side of the
camera display to light. If the keyboard remains inactive for about
five seconds, the camera display will return to default mode and
again display the camera number. The third mode is for error
display (reference the Error Messages section of this manual).
When the user enters an erroneous key sequence, the keyboard
beeps and an error number is temporarily displayed (approx. 2
seconds). If an operator attempts to invoke a restricted function,
the camera number will be temporarily replaced with an
appropriate system error number. If an attempt is made to access
a monitor or remote device which has been locked by a higher
priority User, the camera number will be temporarily replaced
with an appropriate error number, then the user number of the
operator who placed the lock will be briefly displayed.
9.1.3 On-line Indication
If the camera and monitor number are displayed upon power up,
the keyboard is communicating with the system. If the USER and
OFF indicators are lit, the log-on feature of the system has been
enabled by the system installer and the keyboard is waiting for a
user to log-on to the system before operation is permitted. If only
hyphens (dashes) appear in the monitor display (the USER and
OFF indicators are not lit), the keyboard is powered but not
communicating with the system.
9.1.4 Mode Displays
The Mode displays are various indicators that light up within
certain keys to show the keyboard status. The keyboard will stay
in a selected mode until all necessary data have been entered or
until the system has timed out. The default mode is camera
mode.
9.2
Keyboard Controls
The descriptions below indicate the function of the key in its own
mode. A key may have other functions when used in complex
modes. See the appropriate operation section.
9.2.1 Numeric Keypad
This keypad is used to enter numeric data. When the first
numeric key is pressed, the camera display will become a data
display, and indicate the numeric keys pressed.
Digits 0 to 9 - The numeric digits are general purpose keys used
to enter numeric data. Any digit except a leading zero will appear
on the camera display. The keyboard will only recognize four
numeric digits at a time. If the data entered is not terminated in a
command in about five seconds, the display will clear and again
show the camera number.
CLEAR Key - The CLEAR key reinitializes the keyboard. In
some cases it can be pushed twice. If there are numeric data in the
camera display, the first push clears this data and the second push
returns the keyboard to the camera mode. This allows the user to
clear incorrect data without leaving the current mode. If there are
no data in the camera display, the first push clears the entire
keyboard back to the default state.
ENTER Key - The ENTER key terminates commands. It
resembles the 'enter' key on a computer keyboard, and indicates
the end of numeric data entry. Holding this key when using the
ON or OFF functions will cause those functions to repeat until
the key is released.
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