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pH ARC Sensors Modbus RTU Programmer’s Manual (EPHUM011)
624300/01 page 29 / 67
2.6.2.3 Reading all Values for PA9
By reading register 3370, the active physical unit of measurement, the selected value, and the min and
max values can be read.
Start
register
Number of
registers
Reg1 /
Reg2
Reg3 /
Reg4
Reg5 /
Reg6
Reg7 /
Reg8
Modbus
function
code
Read
access
Write
access
3370 8 Physical
unit
Current
value
Min
value
Max
value
3, 4 U/A/S none
Figure 2.6.2.3.1: Definition of register 3370.
Command: Moving average
Modbus address: 3370 Length: 8 Type: 3
Read
Parameter: Unit Value Min value Max value
Format: Hex Decimal Decimal Decimal
Value:
0x01 10 1 16
Figure 2.6.2.3.2: Example to read PA9. The physical unit is 0x01 (“none”), the value is 10 and the limit
is 1 to 16.