32
7.5.5 Temperature detection
The following temperature values are output by the BML as
signed 16-bit values in units of °C (Index 0x0052 (82)):
Subindex
Name
Length Access
1
Current temperature
2 bytes
Read
Only
2
Minimum temperature
since start of operation
2 bytes
Read
Only
3
Maximum temperature
since start of operation
2 bytes
Read
Only
4
Minimum temperature
over the entire lifetime
2 bytes
Read
Only
5
Maximum temperature
over the entire lifetime
2 bytes
Read
Only
Tab. 7-12: Structure of the temperature values
The temperature sensor detects the
temperature within the BML. This is always
higher than the ambient temperature.
7.5.6 Threshold values for the temperature warning
The BML allows you to define the following temperature
warning threshold (Index 0x0053 (83)):
Subindex
Name
Length Access
1
Threshold for
temperature exceeded
2 bytes
Read/
Write
2
Threshold for exceeded
temperature
2 bytes
Read/
Write
Tab. 7-13: Structure of the threshold values
The thresholds can be set in a range of –25…+85 °C.
If these thresholds are exceeded or undershot, the BML
issues a warning (see
If the internal temperature of the BML exceeds
95 °C, an
Overtemperature
error is output.
7.5.7 Operating hours counter
The operating hours are recorded inside the BML and
permanently stored (Index 0x0057 (87)).
Subindex
Name
Length Access
1
Operating hours over the
entire lifetime
4 bytes
Read
Only
2
Operating hours since
the last maintenance
4 bytes
Read
Only
3
Operating hours since
the last power-on
4 bytes
Read
Only
Tab. 7-14: Structure of the operating hours
The system command
Reset Maintenance
resets the
operating hours counter to zero for maintenance purposes.
7.5.8 Boot cycle counter
The BML increments the permanently stored boot cycle
counter each time it is re-initialized. Both a system
command
Device Reset
as well as a hardware restart
result in the counter being incremented.
Use Index 0x0058 (88), Subindex 0 to read the 32-bit
value.
7.5.9 Signal quality
(only available for BML SL1-ALZ1-UEZZ-_U1L-…)
The signal quality shows the quality of the measurement
signal from 0…100%. If the value is 255% (0xFF), the
signal quality is unknown. The signal quality (Index 0x00CF)
is output as follows:
Subindex
Name
Length Access
1
Current signal quality
1 byte
Read
Only
2
Maximum signal quality
1 byte
Read
Only
3
Minimum signal quality
1 byte
Read
Only
4
Position off the maximum
signal quality
4 bytes
Read
Only
5
Position off the minimum
signal quality
4 bytes
Read
Only
Tab. 7-15: Structure of the signal quality
Use the system command
Reset Maintenance
to reset all
signal quality parameters.
7
IO-Link Smart Sensor profile Ed. 2 (BML SL1-ALZ1-UE/MZZ-_U1L-…) (continued)
BML SL1-ALZ _-_ _ ZZ- _ _ _ _ - _ _ _ _
Absolute Magnetically Coded Position Measuring System
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