pH ARC SensorsModbus RTU Programmer’s Manual (EPHUM011)
624300/01 page 48/ 67
2.7.5 Currently active Calibration Parameters part 1
In registers5164 (CP1), 5196 (CP2) and 5324 (CP6) the currently active calibration parameters part1
are stored.T heseregisters contain the values for temperature, number of calibrations and operating
hour uponcali bration.
Start
register Number
of
registers
Reg1 / Reg2 Reg3 /
Reg4 Reg5/
Reg6 Reg7/
Reg8 Modbus
function
code
Read
access Write
access
5164 8 Unit of
temperaturef or
CP1 (bitwise
defined)
Value of
temperature
of CP1
Number of
calibrations
at CP1
Operating
hour for
CP1
3, 4 U/A/S none
5196 8 Unit of
temperaturef or
CP2 (bitwise
defined)
Value of
temperature
of CP2
Number of
calibrations
at CP2
Operating
hour for
CP2
3, 4 U/A/S none
5324 8 Unit of
temperaturef or
CP6 (bitwise
defined)
Value of
temperature
of CP6
Number of
calibrations
at CP6
Operating
hour for
CP6
3, 4 U/A/S none
Figure 2.7.5.1:Definition of register 5164 for CP1, 5196 for CP2 and 5324for CP6.
Command: Calibration CP1 values Modbusaddress: 5164 Length: 8Type: 3Read
Parameter: Unit of temperature Temperature Number ofcali Operating hour
Format: Hex Float Decimal Float
Value: 0x00000004 24.35184 6 23.78
Figure 2.7.5.2: Example to read the calibration values for CP1. The physical unitis °C (0x 00000004),
the temperature is 24.35184°C, the number of calibrations at CP1 is 6 and the operating houri s
23.78 h.
Command: Calibration CP2 values Modbusaddress: 5196 Length: 8Type: 3Read
Parameter: Unit of temperature Temperature Number ofcali Operating hour
Format: Hex Float Decimal Float
Value: 0x00000004 24.37691 5 16.45
Figure 2.7.5.3: Example to read the calibration values for CP2. The physical unitis °C (0x 00000004),
the temperature is 24.37691°C, the number of calibrations at CP1 is 5 and the operating houri s
16.45 h.
Command: Calibration CP6 values Modbusaddress: 5324 Length: 8Type: 3Read
Parameter: Unit of temperature Temperature Number ofcali Operating hour
Format: Hex Float Decimal Float
Value: 0x00000004 29.93368 12 379.5167
Figure 2.7.5.4: Examplet o read the calibration values 1 for CP6. The physical unit is °C (4), the
temperatureis 29.93 (°C), the number of calibrations at CP1 is 12 and the operating hour is
379.51 (h).
2.7.6 Currently active Calibration Parameters part 2
Registers5172 (CP1), 5204 (CP2) and 5332 (CP6) are not defined for pH ARC Sensors, ast hey
document atmosphericpressure and salinity used for VISIFERM DO / VISIFERMDO ARC Sensors
only.