Hamilton Electronics EPHUM011 - Manual (Page 63)

pH ARC Sensors Modbus RTU Programmer ’ s Manual (EPHUM011)
624300/01 page 63 / 67
Command: SIP definition Modbus address: 4988 Length: 8 Type: 16
Write
Parameter: T min [°C] T max [°C] Time min [min] Empty
Format: Float Float Float Float
Value: 120 130 30 0
Figure 2.8.5.3: Example to write the SIP definitions.
Command: SIP definition Modbus address: 4988 Length: 8 Type: 3 Read
Parameter: T min [°C] T max [°C] Time min [min] Empty
Format: Float Float Float Float
Value: 120 130 30 0
Figure 2.8.5.4: Example to read the SIP definitions.
Command: CIP definition Modbus address: 4996 Length: 8 Type: 16 Write
Parameter: T min [°C] T max [°C] Time min [min] Empty
Format: Float Float Float Float
Value:
80 100 30 0
Figure 2.8.5.5: Example to write the CIP definitions.
Command: CIP definition Modbus address: 4996 Length: 8 Type: 3
Read
Parameter: T min [°C] T max [°C] Time min [min] Empty
Format: Float Float Float Float
Value: 80 100 30 0
Figure 2.8.5.6: Example to read the CIP definitions.
2.8.6 Reading the Sensor’ s Quality Indicator
In register 4872 the sensor ’ s quality indicator (0-100%) is given.
Start
register Number of
registers Reg1 / Reg2
(Float) Modbus
function
code Read
access Write
access
4872 2 Quality [%] 3, 4 U/A/S none
Figure 2.8.6.1: Definition of register 4872.
Command: Quality indicator Modbus address: 4872 Length: 2 Type: 3 Read
Parameter: Quality [%]
Format: Float
Value:
100
Figure 2.8.6.2: Example to read the sensor ’ s quality indicator.
The sensor ’ s quality indicator is influenced by:
 Offset a pH 7
 Slope
 Errors