Maple Systems OIT Family (ASCII) - Manual (Page 33)

When Screen #1 is displayed on the screen, a “->“ symbol is displayed in the lower right corner
of the screen. The symbol indicates that Screen #1 is chained to another screen. Pressing the
Page Down key advances the display to the next screen (Screen #10). Screen #10 is now dis-
played with a “<->“ symbol in the lower right corner. This symbol indicates that the screen is in
the middle of a chained sequence. The Page Up key would send the OIT display back to Screen
#1. Pressing the Page Down key advances the display to Screen #5. Screen #5 will display with
a “<-" in the lower right corner. This symbol indicates that the screen is the last link of a chained
sequence of screens. Press the Page Up key to return to Screen #10.
A message loop can be created by chaining the last message screen in a chain to the first mes-
sage screen in a chain. In addition, a chained series of message screens can be continuously
displayed without any keypress or request from the ASCII host by configuring each message
screen in the chain for timed display.
Screen Attributes
Horizontal Scrolling
Each message, recipe, alarm, or menu screen can have a single line of up to 128 characters that
scrolls horizontally. The scrolling line travels at the rate of two characters per second starting
with a blank line and scrolling from the right side of the display. This line can be used to get the
OIT operators attention, or for displaying a message that is too long to fit onto the screen.
Blinking Characters
Each character in a message, recipe, alarm, menu, or help screen (including words, register
monitors, etc.) can have the blink attribute enabled or disabled. If the blink attribute is en-
abled, the character will blink once per second for as long as the screen is displayed.
Note: When any portion of a register monitor is programmed to blink, the entire register
monitor will blink.
Timed Display
Normally, each screen remains on the display until another screen is displayed or the screen
is cleared. However, the timed display attribute allows a message, recipe, or menu screen to
be configured so that it displays for a set amount of time, 1 to 255 seconds, after which the
prior screen is displayed. This could be used to display screens which should only be shown
for a brief period of time.
If the screens in a message chain are configured for timed display, each screen in the chain
will display for the specified time and then the next screen in the chain will be automatically
displayed. This feature allows the OIT programmer to create a series of screens that can be
continuously displayed without any keypress or request from the ASCII host.
Note: If Message Stacking is enabled, then the timed display works differently. If several
messages with a timed attribute are in the message stack, each message is displayed for
the preset length of time, then the next message in the stack is displayed. The last
message in the stack will remain on the screen regardless of whether or not it is
configured for a preset length of time.
Beep on Display
Each message, recipe, or menu screen can be configured to beep for two seconds whenever it is
initially displayed on the OIT screen. This feature can be used as an attention-getting device.
32 OIT Family Operation Manual (ASCII)
1010-0088, REV02