Hamilton Electronics EPHUM011 Reading the Selected Physical Unit for Analog Interface, 0x001000

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

2.4.5.5Reading the Selected Physical Unit for Analog Interface

Start	Number of	Reg1 / Reg2	Modbus	Read	Write
register	registers		function code	access	access
4376	2	Selected physical unit of AO1	3, 4	U/A/S	none
		(see chapter 2.5.1)
4504	2	Selected physical unit of AO2	3, 4	U/A/S	none
		(see chapter 2.5.1)

Figure 2.4.5.5.1: Definition of register 4376 / 4504.

Command: Avail unit AO1			Modbus address: 4376		Length: 2	Type: 3	Read
Parameter:	Available unit
Format:	Hex
Value:	0x001000

Figure 2.4.5.5.2: Example to read the selected unit of the selected PMC of AO1. The value returned is “0x001000”, accordingly, the unit is pH. The physical unit for PMC is defined in Reg. 2090 or 2410 and applies automatically for 4-20 mA output.

2.4.5.6Defining the Measurement Values for 4, 12 and 20 mA Output

Start	Number of	Reg1 / Reg2	Reg3 / Reg4	Reg5 / Reg6	Modbus	Read	Write
register	registers				function	access	access
					code
4378	6	Measurement	Measurement	Measurement	3, 4, 16	U/A/S	S
		value at	value at	value at
		Min Output	Max Output	Mid Output
		Current (4 mA)	Current (20	Current (12
		for AO1	mA) for AO1	mA) for AO1
4506	6	Measurement	Measurement	Measurement	3, 4, 16	U/A/S	S
		value at	value at	value at
		Min Output	Max Output	Mid Output
		Current (4 mA)	Current (20	Current (12
		for AO2	mA) for AO2	mA) for AO2

Figure 2.4.5.6.1: Definition of register 4378 / 4506.

Command: MinMaxMid value AO1		Modbus address: 4378		Length: 6	Type: 16	Write
Parameter:	Min value	Max value	Mid value
Format:	Float	Float	Float
Value:	3	10	7

Figure 2.4.5.6.2: Example to set the min value to 3 (for 4 mA), the max value to 10 (for 20 mA) and the mid value to 7 (for 12 mA). The corresponding physical unit can be read in register 4376 / 4504 and in 2090 / 2410.

Note:

Mid current must always be defined. However, in linear output mode, the mid current value has no physical meaning and will not affect the 4-20 mA output.

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Contents PH ARC Sensors Important Notice Configuration of the Analog Interfaces Configuration of the Serial RS485 InterfaceConfiguration of the Measurement Sensor Identification and InformationVisiferm do Modbus RTU Programmer’s Manualp/n 624179/01 IntroductionEPHUM011 Reading / Setting Operator Level Operator levels and PasswordsGeneral 0x030x30 Changing Passwords for Operator Level0x0C 18111978 0x0B 18111978Device Address Configuration of the serial RS485 InterfaceReading and Writing the Device Address Reading the Device Address LimitsReading and Writing the Baud Rate Baud RateReading the Baud Rate Limits Available Analog Interfaces Configuration of the Analog InterfacesAvailable Analog Interface Modes 0x07 Description of the Analog Interfaces 1 Selection of an Analog Interface Mode MA interface #1 MA interface #20x21 Configuration of the 4-20 mA Interface0x01 PH ARC Sensors Modbus RTU Programmer’s Manual EPHUM011 0x001000 Reading the Selected Physical Unit for Analog InterfaceDefining the Measurement Values for 4, 12 and 20 mA Output PH ARC sensor 4-20mA inte rface linear Defining a Constant Current Output for Testing 0x010001 99186 99742 Reading the Internally Measured Output CurrentDefinition of Measurement Channels and Physical Units MeasurementSpecial Description of PMC1 Primary Measurement Channel 1 pHSelecting the Physical Unit for PMC1 0x2010000x1000 02503 0x00 Reading the measurement value of PMC10x200000 175.9922 0x00 954.6541 Description of PMC6 Primary Measurement Channel 6 TemperatureSelecting the Physical Unit for PMC6 0x06Definition of the Measurement Status for PMC1 / PMC6 Input of an Externally Measured TemperatureReading the measurement value of PMC6 0x04 24.35834 0x00 130Description of SMC Secondary Measurement Channels0x8000 247.56 Reading the measurement value of SMCAvailable Parameters Configuration of the MeasurementEffect of Moving Average n=1 vs n=16 2 PA9 Moving AverageSelecting the Physical Unit and Writing the Value for PA9 Description of PA9 Moving AverageReading all Values for PA9 Description of PA12 Moving Average R 3 PA12 Moving Average RSelecting the Physical Unit and Writing the Value for PA12 Reading all Values for PA12 Available Calibration Points CalibrationCalibration Points 1 and 2 Standard Calibration Definitions of Calibration PointsCP1 CP2CP6 Calibration Point 6 Product CalibrationCalibration at CP1 and CP2 Standard Calibration Calibration ProcedurePH ARC Sensors Modbus RTU Programmer’s Manual EPHUM011 Choose one of the calibration points CP1 or CP2 0x00000000 0x00001000 Calibration at CP6 Product Calibration 100200 Product calibration Initial measurement Definition of the commands for product calibrationProduct calibration Assignment Product calibration CancelProduct calibration Restore product calibration Product calibration Restore standard calibrationReading the Calibration Status of CP1 and CP2 Reading the Calibration Status0x00000180 0x00001000 0x00000080 0x00001000Reading the Calibration Status of CP6 Product Calibration 0x08000000 0x00001000 0x01000000 0x000010000x0A000000 0x00001000 0x14000000 0x000010000x10000000 0x00001000 0x00000004 24.35184 23.78 Currently active Calibration Parameters part0x00000004 24.37691 16.45 0x00000004 29.93368 379.5167006804 099747 296.6901 003401 179.927 297.137810469 298.3302 607782 59.47631 298.15Special Commands for Calibration with Visical Available Sets of Calibration Standards Calibration StandardsLSB 0x00000001 Set 0x0000003F180 Definitions for Individual Sets of Calibration Standards0x0FFF0FFF 0x05540FFF 0x02480FFFNist Standard DINMettler Toledo Radiometer Sensor Status Temperature Ranges168.3667 Operating Hours and CountersHistory of Warnings Currently Active WarningsDefinition of Warnings Currently Active Errors ErrorsHistory of Errors Definition of Errors SIP Reading Definition of SIP and CIPCIP 120 130 Reading the Sensor’s Quality IndicatorGeneral Information Sensor Identification and InformationSensor Identification EPHFI0100001001 Free User Memory SpaceFreeuserspace Recall Sensor’s Factory Settings System CommandsHello World 732255PH ARC Sensors Modbus RTU Programmer’s Manual EPHUM011