VT110

This document is the user's guide for the Digital VT110, a combined VT100 video terminal and DPM01 DECdataway terminal multiplexer.

Key aspects covered include:

• General Information: Describes the VT110's components and its role in Distributed Plant Management (DPM) systems. The DPM01 is a microprocessor-based peripheral interface providing four serial I/O ports (20 mA current loop or EIA RS232-C) to connect devices to a DECdataway. It functions as both a remote electrical interface and a data preprocessor.
• Specifications: Detailed electrical, environmental, and physical specifications for the VT110 unit, as well as terminal interface data rates and formats.
• Controls and Indicators: Explains the three-position mode switch (NORM, MAINT, SUPVR) for operation and diagnostics, and the port status indicators.
• Installation: Provides instructions for unpacking, inspecting, and physically installing the VT110, including connecting power and data cables, and detailed steps for fabricating terminal cables with specific connector pin assignments.
• Field Acceptance Procedure: Outlines a comprehensive test procedure to ensure the VT110 is operational after delivery, involving various loopback tests and diagnostic software runs.
• Operator's Guide & Troubleshooting: Details the VT110's operating modes, interpretation of status indicators, and built-in diagnostic routines (general diagnostic testing, echo test, and DECdataway address verification) to help isolate issues.
• Application Notes: Discusses specific operating considerations, such as restrictions when the VT100 portion emulates a VT52 terminal for DPM01 CRT delete functions.
• Appendices: Includes an FDM (Field Distribution Management) service addendum outlining customer and Digital Equipment Corporation responsibilities for maintenance, and DECdataway connector addressing data.

The manual is intended to guide users through the installation, operation, and basic maintenance of the VT110.