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No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form without written permission from HAMILTON Bonaduz AG. The contents of this manual are subject to change without notice. Technical changes reserved. All efforts have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, HAMILTON Bonaduz AG would greatly appreciate being informed of them. The above notwithstanding, HAMILTON Bonaduz AG can assume no responsibility for any errors in this manual or their consequences. Copyright © 2010 HAMILTON Bonaduz AG, Switzerland. Rev. Revision Date Author Change Description 01 22.04.2010 Ph. Arquint R. Dietrich D. Schonfuss Initial Version 01 for EPHUM011 pH ARC Sensors Modbus RTU Programmer’s Manual (EPHUM011) 624300/01 page 3 / 67 Table of Content 1 MODBUS RTU GENERAL INFORMATION ............................................................................... 4 1.1 INTRODUCTION ..................................................................................................................... 4 2 PH ARC SENSOR COMMANDS IN MODBUS RTU................................................................... 5 2.1 GENERAL ............................................................................................................................. 5 2.2 OPERATOR LEVELS AND PASSWORDS ..................................................................................... 5 2.2.1 Reading / Setting Operator Level................................................................................. 5 2.2.2 Changing Passwords for Operator Level ..................................................................... 6 2.3 CONFIGURATION OF THE SERIAL RS485 INTERFACE ................................................................. 7 2.3.1 Device Address........................................................................................................... 7 2.3.2 Baud Rate................................................................................................................... 8 2.4 CONFIGURATION OF THE ANALOG INTERFACES......................................................................... 9 2.4.1 Available Analog Interfaces ......................................................................................... 9 2.4.2 Available Analog Interface Modes ............................................................................... 9 2.4.3 Description of the Analog Interfaces 1 and 2.............................................................. 10 2.4.4 Selection of an Analog Interface Mode ...................................................................... 10 2.4.5 Configuration of the 4-20 mA Interface ...................................................................... 11 2.4.6 Reading the Internally Measured Output Current ....................................................... 17 2.5 MEASUREMENT................................................................................................................... 18 2.5.1 Definition of Measurement Channels and Physical Units ........................................... 18 2.5.2 Primary Measurement Channel 1 (pH) ...................................................................... 20 2.5.3 Primary Measurement Channel 6 (Temperature) ....................................................... 22 2.5.4 Definition of the Measurement Status for PMC1 / PMC6............................................ 23 2.5.5 Secondary Measurement Channels 1-16................................................................... 24 2.6 CONFIGURATION OF THE MEASUREMENT ............................................................................... 26 2.6.1 Available Parameters ................................................................................................ 26 2.6.2 PA9: Moving Average................................................................................................ 27 2.6.3 PA12: Moving Average R.......................................................................................... 30 2.7 CALIBRATION...................................................................................................................... 32 2.7.1 Available Calibration Points....................................................................................... 32 2.7.2 Definitions of Calibration Points................................................................................. 33 2.7.3 Calibration Procedure................................................................................................ 35 2.7.4 Reading the Calibration Status .................................................................................. 44 2.7.5 Currently active Calibration Parameters part 1........................................................... 48 2.7.6 Currently active Calibration Parameters part 2........................................................... 48 2.7.7 Currently active Calibration Parameters...