Balluff BTL7-T500 Series, Руководство по настройке

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4
Configuration (continued)
4.6 Setting the number of magnets
Selecting the telegram automatically sets the number of
magnets. The BTL7-T500… can process up to 16
magnets. In normal mode, it is recommended to set a fixed
number of magnets in the configuration program by
inserting a module, as this reduces susceptibility to
malfunctions, as well as reducing the processing speed. In
flexible magnet mode (FMM), the number of magnets is
variable.
For magnets that are not detected or configured, the error
value 16#7FFFFFFF is output as position and speed. If
more magnets than parameterized are located in the
measuring range (with FMM, more than 16), the excess
magnets are ignored. The BTL7-T500… always evaluates
the magnets from the plug side regardless of other
settings.
4.6.1 Flexible Magnet Mode (FMM)
In the flexible magnet mode, the number of magnets is not
specified. The BTL7-T500… accepts any number of
magnets up to a maximum of 16 and allows changing of
the number during operation as well. However, after the
number of magnets is changed, a diagnostic is issued,
which can be canceled after a period of time that can be
configured in the Diagnostic time for FMM parameter . The
new number of magnets is accepted once this period has
elapsed. If no magnet is located in the detection range, the
error persists until at least one magnet is detected. For
magnets that are not present, the error value 16#7FFFFFFF
is output as position and speed value.
FMM mode requires the same time for measuring and
processing as does operating with 16 magnets.
If, for example, you have four magnets (A, B, C, and D as
seen from the connector end), then magnet A is assigned
to position (or module) 1, magnet B to position 2, etc.
Fig. 4-5: Example with 4 magnets (exemplary style)
If magnet C is removed, an error value is output for all
positions for the time set in the Diagnostic time for FMM
parameter and a diagnostic is issued.
Fig. 4-6: Example: Magnet C removed (exemplary style)
After the set time has elapsed, the magnets are again
assigned in the order in which they are detected. In our
example only three magnets are still detected. These are
assigned to positions 1-3. The missing fourth magnet is
assigned to position 4, which remains on the error value.
Fig. 4-7: Example: Magnet reassignment (example form factor)
Please note that the evaluation of the positions in the
controller must be adapted to this reassigned.
BTL7-T500-…
Configuration Guide