BisSloLo BiSS data (SLO)
is permanently
Low.
The SLO line should be set
to high by the BiSS slave
when it is ready to
establish communication.
This error usually happens
when there is some issue
with the power or
communication link, e.g.
one of the wires is broken
or not well connected.
BisFrame BiSS Frame
configuration
error.
The sensor configuration
causes an issue related to
the BiSS frame. This error
is currently raised only if
the BiSS frame size is
higher than 64 bits.
Please check the sensor configuration
according to the documentation of the
encoder manufacturer. The most relevant
objects to check:
1. Resolution, unit Inc/ Revolution
2. Multiturn resolution, unit number of bits
3. Number of filling bits, unit number of bits
BisCrc BiSS CRC error. The BiSS frame contains a
CRC6 of some of the data
that is being sent. This
error is raised when the
CRC sent by the BiSS slave
is different than the CRC
computed by the drive.
This usually means that
the drive can't read the
frame properly.
Regarding a CRC error, there are several
causes often seen:
1. Misconfiguration of the sensor reading
leading to the bits being read wrong. In this
case the fault cannot be reset. Please check
the sensor configuration according to the
documentation of the encoder
manufacturer. Common parameters wrongly
configured are the singleturn resolution and
multiturn resolution.
2. Misconfiguration of the object CRC
polynom, thus the CRC is calculated wrong.
In this case the fault cannot be reset. Please
check the polynom in the encoder
documentation. The value by default: 48
represents x^0 + x^1 + x^6, which usually
doesn't need to be modified.
3. Inconsistency in signal transfer. In this
case the fault can sometimes be reset, but
would occur under certain circumstances.
Please check the signals received by the
drive with an oscilloscope under operation
for better investigation. The cause can be
that the signal transfer is influenced by
external field, or that the signal transfer is
unstable for example due to soldering
quality or cable aging. Improve the situation
by replacing the cables, better arranging the
cables, adding shielding, etc., ensuring that
the signals can be stably transfered with
acceptable noise.
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