pH ARC SensorsModbus RTU Programmer’s Manual (EPHUM011)
624300/01 page 23/ 67
2.5.3.3 Reading the measurementvalue of PMC6
Register 2410is also used to read the measurement values of PMC6.
Start
reg. Num-
ber of
reg.
Reg1 /
Reg2 Reg3/
Reg4 Reg5/
Reg6 Reg7/
Reg8 Reg9/
Reg10 Modbus
function
code
Read
access Write
access
2410 10 Selected
physical
unit
Measure
-ment
value of
PMC6 (1)
Measure
-ment
status(2)
Min
allowed
value (1)
Max
allowed
value (1)
3, 4 U/A/S none
Figure 2.5.3.3.1:Definition of register 2410. Measurement value of PMC6.
(1) Value is alwaysin the physical unit defined in register 2410.
(2) For definitionof the status see chapter 2.5.4. All bits set to zero means: no problem.
Command: PMC6read Modbusaddress: 2410 Length: 10 Type: 3Read
Parameter: Unit Value Status Min limit Max limit
Format: Hex Float Hex Float Float
Value: 0x04 24.35834 0x00 -20 130
Figure 2.5.3.3.2: Exampleto readregister 2410. Physical unit is set to ° C(0x04), PMC6 is 24.35834
°C, Status is 0x00, Min allowed value is -20 °C, Max allowed value is 130 °C.
For definitionof the measurement status see chapter 2.5.4.
Attention:
You cannot readselectively the registers 3 and 4 for the measurement value only. You have to readthe
entire length oft hecommand (10 registers) and extract the desired information.
2.5.3.4 Input of an Externally MeasuredTemperature
Unlike to the VISIFERM DO, this feature is not available for pH ARC Sensors.
2.5.4 Definitionof the Measurement Status for PMC1 / PMC6
This is the definitionof the status registers read in registers 2090 (PMC1) and 2410 (PMC6):
Bit # Hexcode Description
0 (LSB) 0x01 Temperature out ofmeasurement range (see chapter 2.8.1)
1 0x02 Temperatureout of operating range (see chapter 2.8.1)
2 0x04 Calibrationstatus not zero (see chapter 2.7.4)
3 0x08 Warningnot zero (see chapter 2.8.3)
4 0x10 Errornot zero (see chapter 2.8.4)
Figure 2.5.4.1: Definitionof measurement status for Primary Measurement Channels.