Справочное Руководство для LXE 1280
Non-Form Messages
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LDS Plus Reference Guide
Control Character and Beep Pattern Character
A DOS terminal is equipped with a beeper to get the operator's attention at certain occurrences.
You can use this feature to cause the DOS terminal to beep in different patterns for different kinds
of messages. The beeper is an additional means of communication between the host computer and
the DOS terminal operator.
You can use this feature to cause the DOS terminal to beep in different patterns for different kinds
of messages. The beeper is an additional means of communication between the host computer and
the DOS terminal operator.
Application
You may wish to change the beep pattern when you send a non-form message that you want to
call to the operator's attention.
call to the operator's attention.
Beep Control Characters
As with all beep pattern changes, you must select the appropriate control character and a beep
pattern character to enable you to specify the number of beeps generated at the DOS terminal
when it receives a non-form message.
pattern character to enable you to specify the number of beeps generated at the DOS terminal
when it receives a non-form message.
Control characters used when changing the beep pattern with a forced non-form message are:
Control
Character
Character
N/EF Character
Required (Y/N)
Required (Y/N)
Forced Non-Form Message
Effect on DOS Terminal
Effect on DOS Terminal
Q
Y
Activates Multiple Beeps.
S Y
• Activates Barcode Mode.
• Activates Multiple Beeps.
• Activates Multiple Beeps.
W Y
• Activates Auxiliary Input Mode.
• Activates Multiple Beeps.
• Activates Multiple Beeps.
See Appendix D, “Code Tables and Character Sets”, for all control characters.
Beep Pattern Characters
The beep frame occupies a total of nine equal length units of time. Beep pattern ASCII characters
are: Space and A-H.
are: Space and A-H.
By default, errors are accompanied by three beeps -- any non-error is accompanied by one beep.
For example, a form sent to the terminal causes the terminal to beep once when the form arrives in
the computer.
For example, a form sent to the terminal causes the terminal to beep once when the form arrives in
the computer.
Refer to “Control Character (CTRL)”, documented previously in this chapter, for the full Beep
Pattern Characters chart.
Pattern Characters chart.
See also Chapter 5, “Expanded Functions”. Many expanded functions generate terminal beeps.