VT14

This document is the VT14 User's Manual, providing comprehensive instructions for programming and using the VT14 Programming Terminal with Digital Equipment Corporation's Industrial 14/30 and 14/35 Controllers. The manual details how to design, enter, and troubleshoot control programs in ladder diagram form.

Key sections include:

• Getting on the Air: An introduction to the VT14, its basic operation, and capabilities, with initial steps for entering simple control circuits.
• Writing Your Control Program: Detailed guidance on designing control circuits, including I/O numbering conventions, internal I/O groupings (retentive memories, shift registers, timers, and various counters), and circuit rules.
• Entering the Program: Instructions for loading programs into the controller's memory, covering memory clearing, step-by-step circuit entry, storing, editing, removing, and displaying circuits, as well as presetting timer and counter values.
• On-Line Use of the VT14: Information on utilizing the VT14 during system checkout and startup, including checking I/O status, running programs, monitoring control circuits (with visual indication of "current path"), and using the "Force I/O Mode" for disabling and forcing I/O states to aid in troubleshooting.

Appendices cover VT14 program documentation, cascading timers and counters, installation procedures for the VT14, and circuit grid forms for program design. The manual highlights the VT14's ease of use for control circuit design and system debugging through its keyboard and CRT display.