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english
7
IO-Link interface (continued)
7.2
Process data (PD)
The BMP variants output a measurement value and
additional status and switch point information cyclically via
the IO-Link interface.
Byte
5
4
3
2
1
0
Measurement value
Scaling
factor
Status
and
SSCs
Tab. 7-2: Process data
Measurement value
The measurement value corresponds to the position of the
target in μm and consists of a signed 32-bit value.
Scaling factor
The scaling factor indicates the factor by which the
measurement value must be multiplied in order to obtain
the value in the SI unit.
The scaling factor is for BMP –6 (0xFA):
Measurement value × 10
−6
= Position [m]
Status and SSC
Bit Name
Function
7
System Error
The BMP no longer functions
(storage error, hardware
defective).
6
Out of Range /
No Measure-
ment Data
The BMP does not detect a target
in the detection range.
5
Out of
Measurement
Range
The target is located outside of
the configured measuring range.
4
Measurement
Value Unsafe
The target is located within the
set measuring range, however the
excess gain is low.
3
SSC 4
Switch information for the fourth
switch point
2
SSC 3
Switch information for the third
switch point
1
SSC 2
Switch information for the second
switch point
0
SSC 1
Switch information for the first
switch point. SSC 1 is placed on
output OUT 1 in SIO mode.
Tab. 7-3: Status and SSCs
In the case of an error, the data is only marked as invalid
using the
PD Invalid Bit
if the device absolutely cannot
supply valid data.
The IO-Link functionality
PD Invalid Bit
is
handled differently by different IO-Link masters
(refer to the manual for the respective master).
Measur
ement value
No target
No target
Out of range (negative)
Out of range (positive)
Position
Detection range
Measuring range
Status bits
1)
Bit 4 0 0 0
0/1
2)
0 0 0
Bit 5 0 0 1
0
1 0 0
Bit 6 1 1 0
0
0 1 1
1)
2)
If this bit is set, the excess gain is low. The target is magnetized too
weakly or it is too far away from the BMP.
Fig. 7-1: Ranges and output
If the target is located below or above the detection range
and is still detected by the BMP, the measured value is
replaced by the following values:
– Out of range positive:
2'147'483'640 (0x7FFFFFF8)
– Out of range negative:
–2'147'483'640 (0x80000008)
In the event of an error (if no valid data can be output), the
measured value is replaced by error value
2'147'483'644
(0x7FFFFFFC)
.
BMP 01-EL1PP _ 1A- _ _ _ _ -00 -P _ _ /P _ _ -S4/P _ _ -S75
Magnetic Field Positioning System
Содержание BMP 01-EL1PP 1A Series
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