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pH ARC Sensors Modbus RTU Programmer’s Manual (EPHUM011)
624300/01 page 60 / 67
2.8.4 Errors
An “Error”message indicates a serious problem of the sensor which does not allow further proper
functioning of the sensor. This problem must be solved.
2.8.4.1 Currently Active Errors
The currently active errors are stored in register 4800.
Start
register
Number
of
registers
Reg1 /
Reg2
Reg3 /
Reg4
Reg5 /
Reg6
Reg7 /
Reg8
Modbus
function
code
Read
access
Write
access
4800 8 Active error
measure-
ment
(bitwise
defined)
Active error
calibration
(bitwise
defined)
Active error
interface
(bitwise
defined)
Active error
hardware
(bitwise
defined)
3, 4 U/A/S none
Figure 2.8.4.1.1: Definition of register 4800 (see chapter 2.8.4.3)
Command: Active errors
Modbus address: 4800 Length: 8 Type: 3
Read
Parameter: E Measurement E Calibration E Interface E Hardware
Format: Hex Hex Hex Hex
Value:
0x00 0x00 0x00 0x00
Figure 2.8.4.1.2: Example to read the currently active errors.
2.8.4.2 History of Errors
The history of errors is not implemented in pH ARC Sensors.