Lumel N31U - Default Chapter; Table of Contents

2
N31U User manual
1 APPLICATION.......................................................................................................3
2 METER SET...........................................................................................................4
3 BASIC REQUIREMENTS, OPERATIONAL SAFETY...................................4
4 INSTALLATION......................................................................................................5
4.1 Installation method......................................................................6
4.2 External connection diagram...................................................8
4.3 Examples of connecting the external transducers...............10
5 SERVICE..............................................................................................................11
5.1 Description of the frontal plate.................................................................11
5.2 Buttons’ functions...................................................................................13
5.3 Description of the frontal plate..............................................................14
5.3.1 How to change quantity of a selected parameter.......................17
5.3.2 Programmable meter parameters, default parameters............18
5.4 Meter functions........................................................................................23
5.4.1 Measurement.................................................................................23
5.4.1.1 Averaging the measuring quantity...............................................24
5.4.1.2 Minimum and maximum measuring values............................24
5.4.1.3 Mathematical functions.............................................................25
5.4.1.4 Individual characteristic............................................................25
5.4.2 Alarm output.................................................................................26
5.5 RS-485 interface.....................................................................................28
5.5.1 Connection....................................................................................28
5.5.2 Description of the MODBUS protocol implementation...............29
5.5.3 Implemented functions of MODBUS protocol...........................30
5.5.4 Map of the registers.......................................................................30
5.5.4.1 Registers 4000 – 4024..............................................................31
5.5.4.2 Registers 4200 – 4219...............................................................35
5.5.4.3 Registers 7500 – 7530 and 7000 – 7030...............................36
5.5.4.4 Registers 7600 – 7668 and 7200 – 7336................................37
6 ERROR CODES..................................................................................................39
7 TECHNICAL DATA.............................................................................................40
8 ORDERING CODE.............................................................................................43
CONTENTS