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pH ARC Sensors Modbus RTU Programmer’s Manual (EPHUM011)
624300/01 page 59 / 67
2.8.3 Warnings
A “Warning”is a notification message which still allows further functioning of the system. This message
alerts the operator of a possible problem that could lead to uncertain results.
2.8.3.1 Currently Active Warnings
The currently active warnings are stored in register 4736.
Start
register
Number of
registers
Reg1 /
Reg2
Reg3 /
Reg4
Reg5 /
Reg6
Reg7 /
Reg8
Modbus
function
code
Read
access
Write
access
4736 8 Active
warning
measure-
ment
(bitwise
defined)
Active
warning
calibration
(bitwise
defined)
Active
warning
interface
(bitwise
defined)
Active
warning
hardware
(bitwise
defined)
3, 4 U/A/S none
Figure 2.8.3.1.1: Definition of register 4736 (see chapter 2.8.3.3)
Command: Active warning
Modbus address: 4736 Length: 8 Type: 3
Read
Parameter: W Measurement W Calibration W Interface W Hardware
Format: Hex Hex Hex Hex
Value:
0x00 0x00 0x00 0x00
Figure 2.8.3.1.2: Example to read the currently active warnings.
2.8.3.2 History of Warnings
The history of warnings is not implemented in pH ARC Sensors.
2.8.3.3 Definition of Warnings
Bit # Hex Description
not available
Figure 2.8.3.3.1: Definition of warnings “measurement”. None is defined.
Bit # Hex Description
0 (LSB) 0x0001 PMC1 (pH) calibration recommended
1 0x0002 PMC1 (pH) last calibration not successful
Figure 2.8.3.3.2: Definition of warnings “calibration”.
Bit # Hex Description
not available
Figure 2.8.3.3.3: Definition of warnings “interface”. None is defined.
Bit # Hex Description
not available
Figure 2.8.3.3.4: Definition of warnings “hardware”. None is defined.