pH ARC SensorsModbus RTU Programmer’s Manual (EPHUM011)
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Table of Content1 MODBUSRTU GENERAL I NFORMATION............................................................................... 4
1.1 INTRODUCTION ..................................................................................................................... 4
2 PH ARCSENSOR COMMANDS IN MODBUSRTU................................ ...................................5
2.1 GENERAL............................................................................................................................. 5
2.2 OPERATOR LEVELS AND PASSWORDS ..................................................................................... 5
2.2.1 Reading/ Setting Operator Level.................................................................................5
2.2.2 ChangingPasswords for Operator Level..................................................................... 6
2.3 CONFIGURATION OF THE SERIAL RS485 INTERFACE ................................................................. 7
2.3.1 DeviceAddress........................................................................................................... 7
2.3.2 BaudRate................................................................ ................................................... 8
2.4 CONFIGURATION OF THE ANALOG INTERFACES......................................................................... 9
2.4.1 AvailableAnalog Interfaces......................................................................................... 9
2.4.2 AvailableAnalog Interface Modes ...............................................................................9
2.4.3 Descriptionof the Analog Interfaces1 and 2.............................................................. 10
2.4.4 Selectionof an Analog Interface Mode...................................................................... 10
2.4.5 Configurationof the 4-20 mA Interface...................................................................... 11
2.4.6 Readingthe Internally MeasuredOutput Current .......................................................17
2.5 MEASUREMENT................................................................................................................... 18
2.5.1 Definition of Measurement Channelsand Physical Units ................ ........................... 18
2.5.2 PrimaryMeasurement Channel 1 (pH) ...................................................................... 20
2.5.3 PrimaryMeasurement Channel 6 (Temperature)....................................................... 22
2.5.4 Definition of the Measurement Statusf orPMC1 / PMC6 ............................... ............. 23
2.5.5 SecondaryMeasurement Channels 1-16................................................................... 24
2.6 CONFIGURATION OF THE MEASUREMENT ............................................................................... 26
2.6.1 AvailableParameters................................................................ ................................ 26
2.6.2 PA9: MovingAverage................................................................................................ 27
2.6.3 PA12:Moving Average R................................ ..........................................................30
2.7 CALIBRATION...................................................................................................................... 32
2.7.1 AvailableCalibration Points....................................................................................... 32
2.7.2 Definitionsof Calibration Points................................................................................. 33
2.7.3 CalibrationProcedure................................................................................................ 35
2.7.4 Readingthe Calibration Status.................................................................................. 44
2.7.5 Currentlyactive Calibration Parameters part 1........................................................... 48
2.7.6 Currentlyactive Calibration Parameters part 2........................................................... 48
2.7.7 Currentlyactive Calibration Parameters part 3........................................................... 49
2.7.8 Currentlyactive Calibration Parameters part 4........................................................... 49
2.7.9 SpecialCommands for Calibration withVISICAL .......................................................50
2.7.10 CalibrationStandards................................................................................................ 51
2.8 SENSORST ATUS ................................................................................................................ 57
2.8.1 TemperatureRanges ................................................................................................ 57
2.8.2 OperatingHours and Counters.................................................................................. 58
2.8.3 Warnings.................................................................................................................. 59
2.8.4 Errors........................................................................................................................60
2.8.5 ReadingDefinition of SIP and CIP............................................................................. 62
2.8.6 Reading the Sensor’sQuality Indicator...................................................................... 63
2.9 SENSORIDENT IFICATION AND INFORMATION........................................................................... 64
2.9.1 GeneralInformation .................................................................................................. 64
2.9.2 SensorIdentification.................................................................................................. 64
2.9.3 FreeUser MemorySpace ......................................................................................... 65
2.10 SYSTEMCOMMANDS ................................ ........................................................................... 66
2.10.1 RecallSensor’s Factory Settings............................................................................... 66
3 ABBREVIATIONS....................................................................................................................66