DigiTech C0408 Section Video Display Terminal Programming, Introduction, General Information

IMl66-083 System Programming j

SECTION 3

VIDEO DISPLAY TERMINAL PROGRAMMING

INTRODUCTION

The class of service can be programmed from a video display terminal (VDT) instead of from the programming station. The VDT that is used must be a serial-data, W-232 type, asynchronous device. A keyboard send/receive (KSR) hard-copy printer can be used instead of a VDT if preferred.

A personal computer (PC) can be employed if it will run a communications software program which allows it to emulate a data terminal device (DTE equipment). Many effective communications software programs are available for this purpose. Any that can be arranged to match the following data communications parameters can be used:

-Full Duplex

-XMODEM communication protocol (8 bit data required)

Regardless of the type of programming terminal employed, it is connected to the common equipment data port A. Refer to the Chapter 3, Section 2 paragraph tiled, DATA DEVICE CONNECTlONSfor complete connection details.

VDT PROGRAMMING PROCEDURE

INTRODUCTION

The programming procedure is menu driven.

A list of selections are presented for consideration which differ in content and required response.

Each selection, when responded to, either causes a further breakdown of selections to be presented or causes a particular COS programming action to take place.

This menu system prompts the programmer for the required response and, where appropriate, will repeat prompts to allow programming of more than one device without having to make another menu selection.

All of the menus operate in the same manner. They differ in only the required response.

Each prompt requires a response followed by a Carriage Return (RETURN). The responses usually consist of a one or two-digit number or a string of numbers or alpha-numeric characters when programming names and messages.

Successive entries are separated by a space or a comma.

GENERAL INFORMATION

There are two responses which allow a programmer to quit a procedure.

•RETURN (ENTER on some keyboards) - This action returns the user to the top of the current menu.

•CONTROL C - This action returns the user to the top of the main menu.

There are certain other responses which have special functions.

•Responding with the @ key will print or display the menu that the programmer is currently using. The system is waiting at the same prompt line as it was before the menu was repeated.

•Responding with the ? key will cause a help menu to be printed if one is available. The system is waiting at the same prompt line as tt was before the help menu was requested.

There are special line edit characters.

Backspace, Delete, Rub-out - Used to delete characters from the response line as they are being typed.

CONTROL R - Causes the current response line to’ be echoed for review.

CONTROL D - Causes the current response line to be deleted.

CONTROL S - Causes printing or display action stop.

CONTROL Q - Causes the printing or display to resume.

There are two system acknowledgement messages to a response line.

COMMAND ACCEPTED - Response accepted.

***COMMAND REJECTED**’ - Response not accepted. The terminal bells also sounded.