Balluff BOS R254K-UUI-LH10-S4, Manual

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5.7 Operating Hours Counter
5.7.1 Description
The operating hours counter can record the operating
hours of a device accurately to the second. There are a
total of three operating hours counters. In addition to an
operating hours counter for the operating hours since the
start of the device, there is a total operating hours counter
and a customer-specific operating hours counter that can
be reset. The storage rate can be set and no operating
hours are stored upon reaching 500000 storage cycles.
The output of the operating hours can serve as a time
control for the service interval as well as for preventative
maintenance. Schedules for regular service can be tied to
the operating hour values. Moreover, a high value of the
total operating hours is indicative of intensive use of a
sensor and possible deterioration of the performance. The
risk of failure can be countered preventatively through
replacement.
5.7.2 Algorithm
While the counter is incremented every second, the
storage rate doubles after each save operation. Starting
with a save operation after 1 minute, then after 2 minutes,
then after 4 minutes, then after 8 minutes, until a maximum
storage rate of every 12 minutes.
5.7.3 Process Data
Object ID Name Description Direction
0x001B (27) Current Operating Hours Output of the current operating hours counter Input
0x001C (28) Total Operating Hours Output of the total operating hours counter Input
0x001D (29) Custom Operating Hours Output of a user-defined operating hours counter Input
Tab. 5-36: Operating hours counter – Process data
Also see section Process Data Profiles on page 9.
5.7.4 ISDU
Name Index Subindex Access Length Data Type Data
Storage
Default
Current
Operating
Hours
0x0057 (87) 1 R 4 bytes UINT32 No 0
Total
Operating
Hours
0x0057 (87) 2 R 4 bytes UINT32 No 0
Custom
Operating
Hours
0x0057 (87) 3 R 4 bytes UINT32 No 0
Operating
Hours Saving
Mode
0x0074 (116) 0 R/W 1 byte ENUM Yes 0
Tab. 5-37: Operating hours counter – ISDU
5
Secondary Device Functions (continued)
BOS R254K-UUI-LH10-S4
Photoelectric Sensors