pH ARC Sensors Modbus RTU Programmer’s Manual (EPHUM011)

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 part 3

49

2.7.8

Currently active Calibration Parameters part 4

49

2.7.9

Special Commands for Calibration with VISICAL

50

2.7.10

Calibration Standards

51

2.8

SENSOR STATUS

57

2.8.1

Temperature Ranges

57

2.8.2

Operating Hours and Counters

58

2.8.3

Warnings

59

2.8.4

Errors

60

2.8.5

Reading Definition of SIP and CIP

62

2.8.6

Reading the Sensor’s Quality Indicator

63

2.9

SENSOR IDENTIFICATION AND INFORMATION

64

2.9.1

General Information

64

2.9.2

Sensor Identification

64

2.9.3

Free User Memory Space

65

2.10

SYSTEM COMMANDS

66

2.10.1

Recall Sensor’s Factory Settings

66

3 ABBREVIATIONS

66

624300/01

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Hamilton Electronics EPHUM011 manual Configuration of the Serial RS485 Interface, Configuration of the Analog Interfaces