Hamilton Electronics EPHUM011 - Manual (Page 57)

pH ARC Sensors Modbus RTU Programmer ’ s Manual (EPHUM011)
624300/01 page 57 / 67
2.8 Sensor Status
2.8.1 Temperature Ranges
In registers 4608, 4612 and 4616 three different temperature ranges are defined:
 Operation –in this range the sensor will work properly (current output, Modbus
communication), except the measurement, which is stopped until the temperature is back in
the measurement range. In this case the last value of measurement will be frozen and sent to
analog interfaces.
 Measurement –in this range the sensor is able to measure.
 Calibration –in this range the sensor can be calibrated.
Start
register Number of
registers Reg1 / Reg2 Reg3 / Reg4 Modbus
function
code Read
access Write
access
4608 4 Operating
temperature min [°C] Operating
temperature max [°C] 3, 4 U/A/S none
4612 4 Measurement
temperature min [°C] Measurement
temperature max [°C] 3, 4 U/A/S none
4616 4 Calibration
temperature min [°C] Calibration
temperature max [°C] 3, 4 U/A/S none
Figure 2.8.1.1: Definition of register 4608, 4612 and 4616.
Command: Operating T range Modbus address: 4608 Length: 4 Type: 3 Read
Parameter: Operating T min
[°C] Operating T max
[°C]
Format: Float Float
Value: -20 130
Figure 2.8.1.2: Example to read the operating temperature values min and max.
Command: Measurement T range Modbus address: 4612 Length: 4 Type: 3 Read
Parameter: Measurement T
min [°C] Measurement T
max [°C]
Format: Float Float
Value: -20 130
Figure 2.8.1.3: Example to read the measurement temperature values min and max.
Command: Calibration T range Modbus address: 4616 Length: 4 Type: 3 Read
Parameter: Calibration T min
[°C] Calibration T max
[°C]
Format: Float Float
Value: 5 50
Figure 2.8.1.4: Example to read the calibration temperature values min and max.