User guide

TABLE OF CONTENTS
1. INTRODUCTION ....................................................................................................................................... 1
2. HARDWARE.............................................................................................................................................. 1
2.1 Definition of Terms.......................................................................................................................1
2.2 RS-232 Hardware ........................................................................................................................1
2.3 RS-485 Hardware ........................................................................................................................4
3. USING THE CONFIGURATION AND COMMUNICATIONS DISKETTES............................................... 7
3.1 Pushbutton Communications Setup ............................................................................................7
3.2 Diskette-Driven Computer Control...............................................................................................8
4. DEFINITIONS ............................................................................................................................................ 8
4.1 Meter Or DCE ..............................................................................................................................8
4.2 Computer Or DTE........................................................................................................................8
4.3 Point-To-Point..............................................................................................................................8
4.4 Multipoint (Multi-Drop) ................................................................................................................. 8
4.5 Simplex ........................................................................................................................................8
4.6 Half Duplex ..................................................................................................................................8
4.7 Full Duplex...................................................................................................................................9
4.8 RS-232 (CCITT V.24) ..................................................................................................................9
4.9 RTS..............................................................................................................................................9
4.10 RS-422.........................................................................................................................................9
4.11 RS-485.........................................................................................................................................9
4.12 ASCII............................................................................................................................................ 9
4.13 HEX ASCII ................................................................................................................................... 9
4.14 Transmission Voltage Levels.....................................................................................................10
4.15 Recognition Character ...............................................................................................................11
4.16 RAM ........................................................................................................................................... 11
4.17 EEPROM ...................................................................................................................................11
5. BAUD RATES ......................................................................................................................................... 11
6. CHARACTER WAVEFORM.................................................................................................................... 11
7. CLASSES OF OPERATION ................................................................................................................... 12
7.1 Point-To-Point............................................................................................................................12
7.1.1 Continuous Mode ..................................................................................................................12
7.1.2 Command Mode....................................................................................................................12
7.2 Multipoint....................................................................................................................................13
7.2.1 Command Mode....................................................................................................................13
7.2.2 Alarm Mode ...........................................................................................................................13
7.3 The Meter As A Remote Display ...............................................................................................13
7.4 The Meter As A Double Tasking Remote Meter........................................................................ 14
7.4.1 Command Structure For Double Tasking.............................................................................. 14
8. COMMAND AND RESPONSE STRUCTURE ........................................................................................ 15
8.1 Message String..........................................................................................................................15
8.1.1 “Data” and “Non Data”...........................................................................................................15
8.1.2 Brackets and Spaces ............................................................................................................15
8.2 Commands and Structure..........................................................................................................15
8.2.1 Read Communications Configuration Command..................................................................15
8.2.2 General Command Structure ................................................................................................ 16
8.2.3 Command Formats................................................................................................................16
8.2.4 Command Suffix....................................................................................................................17
8.3 Response Structure ...................................................................................................................22
8.3.1 No Error .................................................................................................................................22
8.3.2 Echo Mode (See Sections 10.19 And 11.25) ........................................................................ 22
8.3.3 No Echo Mode.......................................................................................................................22
8.4 Data Length Corresponding To The Response Structure .........................................................23
8.5 Error Response..........................................................................................................................23
CF 125 INFINITY SC GUIDE ii M1519/N/0605