Escient FireBall MP-100 Guide de l'utilisateur télécharger pdf (Page 113)

PAGE 113

FIREBALL-MP INSTALLATION & USER’S GUIDE - M21101-

APPENDIX D- EXTERNAL CONTROL PROTOCOL

Commands and Responses Overview

The external control protocol is standard ASCII based. ESCX is the four letter preamble that is used for all commands. This preamble must

be uppercase. The commands provided in this protocol allow an external control system to navigate the Escient products, get library informa-

tion to build custom user interfaces, perform transport controls, and receive unsolicited feedback on system status.

All external control commands are made up of the preamble (ESCX), command group (01,02,10,20,50,70), sub command (specic task),

specic data (# of data items, and a size of data packet then the actual data packet repeated for the # of data items), and a carriage return end

marker.

External Control Command Structure

DESCRIPTION

PREAMBLE

COMMAND

GROUP

SUB COM-

MAND

# DATA

ITEMS

DATA ITEM

#1 SIZE

DATA #1

DATA ITEM

#2 SIZE

DATA #2

END

MARKER

Bytes 4 2 2 3 4 5 4 3 1

Example ESCX 01 08 002 0005 Hello 0003 Bye Carriage Return

The external control commands are broken down into the following Command Groups:

01 – Command Responses

02 – Unsolicited Events

10 – Remote Button / Keyboard Commands

20 – Database Commands

50 – Status Commands

70 – Control Commands

1 2 ... 108 109 110 111 112 113 114 115 116 117 118 ... 160 161

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Escient FireBall MP-100 Guide de l'utilisateur Page 113