Umc800-Rs232 Communications; Overview - Honeywell UMC800 Reference Manual

1. UMC800-RS232 Communications

1.1 Overview

Purpose of this manual
This manual provides information about request and response messages used to exchange information
between a personal computer and a UMC800 Universal Multiloop Controller using the Leaderline Control
Builder RS232 communications port.
How the manual is structured
In the first section, a full RS232 Protocol description for message exchange is provided for those wishing to
write a driver in a specific programming language.
For those specifically using Microsoft Visual C++ on Windows 95 or NT, a driver code library is provided
on a separate diskette (supplied with the manual) allowing direct linkage to C++ programs without further
driver development. The PC Communications Driver section describes use of this library.
A "peek & poke" EXE utility file (with source code) is also provided on the diskette, which can be used to
experiment with UMC 800, RS232 communications to a Controller and can also serve as a guide in general
development using another language
Reader assumptions
We assume that you have had prior experience with programming and interpreting communications
protocols. Also, that you are familiar with UMC800 Controller Function Blocks and the LeaderLine Control
Builder Control Strategy Configuration concepts.
How to use this manual
Use this manual as a reference dictionary of UMC800 controller communications message formats for its
application programs. It is not intended as a comprehensible "how to" documents for initiating computer
communications with a UMC800 Controller.
In this manual
These major topics are covered in this manual.
2 RS232 Port Protocol Description
3. PC Communications Driver
4. Application Layer Message Formats
5. Function Parameter Index Reference
6. Block Status Types
A. Appendix A - CRC-16 Calculation
8/99
Topic
RS232 Communications Reference Manual
Overview
See Page
3
15
27
35
134
136
1