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pH ARC Sensors Modbus RTU Programmer’s Manual (EPHUM011)
624300/01 page 58 / 67
2.8.2 Operating Hours and Counters
In register 4676 are given:
total operating hours
operating hours above max measurement temperature (see chapter 2.8.1)
the operating hours above max operating temperature (see chapter 2.8.1)
In register 4682 are stored:
number of power ups
number of watchdog resets
number of writing cycles to the sensor’s flash memory
In register 4688 are given:
number of sterilizations in place (SIP) (see chapter 2.8.5)
number of cleanings in place (CIP) (see chapter 2.8.5)
Start
register
Number of
registers
Reg1 / Reg2 Reg3 / Reg4 Reg3 / Reg4 Modbus
function code
Read
access
Write
access
4676 6 Operating
hours
[h]
Operating
hours above
max
measurement
temperature
[h]
Operating
hours above
max
operating
temperature
[h]
3, 4 U/A/S none
4682 6 Number of
Power ups
Number of
Watchdog
resets
Number of
Writing
cycles to
flash memory
3, 4 U/A/S none
4688 4 Number of
SIP cycles
Number of
CIP cycles
- 3, 4 U/A/S none
Figure 2.8.2.1: Definition of register 4676, 4682 and 4688.
Command: Operating hours
Modbus address: 4676 Length: 6 Type: 3
Read
Parameter: Operating hours [h] Operating hours
above max
measurement
temperature
[h]
Operating hours
above max
operating
temperature
[h]
Format: Float Float Float
Value:
168.3667 0 0
Figure 2.8.2.2: Example to read the total operating hours, the operating hours above the max
measurement temperature and the operating hours above the max operating temperature.
Command: Power & watchdog
Modbus address: 4682 Length: 6 Type: 3
Read
Parameter: Number of Power
ups
Number of
Watchdog resets
Number of Writing
cycles to flash
memory
Format: Decimal Decimal Decimal
Value:
34 1 16
Figure 2.8.2.3: Example to read the number of power ups, the number of watchdog resets and the
number of writing cycles to flash memory.
Command: SIP & CIP
Modbus address: 4688 Length: 4 Type: 3
Read
Parameter: SIP cycles CIP cycles
Format: Decimal Decimal
Value:
0 0
Figure 2.8.2.4: Example to read the number of SIP cycles and the number of CIP cycles. For the
definition of SIP and CIP cycles see chapter 2.8.5.