ID 442426.04
255
WE KEEP THINGS MOVING
Encoder
12
Manual SD6
Adjusts the number of data bits that will be transferred via SSI.
In an SSI evaluation the value of the bits is adjusted by
H121
and
H122
.
In SSI simulation there is a fixed value relative to
H82
. From a total of 24 or 25
bits, 12 bits correspond to the highest value of whole encoder revolutions
(multi-turns). After that 12 or 13 bits can be coded within a revolution. With a
setting for 13 bits, all 13 bits code the angle within one revolution (single-turn).
The parameter adjusts the clock frequency of the serial transfer for querying
the SSI encoder. A higher clock frequency allows for better control because the
position is transferred faster and can therefore be queried more frequently
overall. However, not all SSI encoders support the high clock frequencies.
The parameter switches off double transfer for SSI encoder. When double
transfer is activated the angle is queried twice in a row with a continuous clock
to achieve greater data security. If the encoder does not support double
transfer, double transfer must be turned off with this parameter. If double
transfer is turned off, the drive controller will no longer generate a second
query.
The parameter shows a description of the functionality found on X120.
Number of lines of encoder simulation on X120. The lines/revolutions refer to
revolutions from
H85
.
The parameter activates timeout monitoring during SSI simulation on X120.
Timeout monitoring triggers fault 58 with cause 2 if no position has be queried
for more than 5 ms.
If timeout monitoring is deactivated, the higher-level control unit must ensure
that the SSI transfer runs without errors and at the correct clock frequency. This
monitoring will then be shut off in the drive!
If the SSI simulation is part of an SSI motion bus (for example synchronous
motion, cam disk), monitoring must remain turned on. Otherwise the operating
safety of the SSI motion bus and with it the application can no longer be
ensured.
If the simulation is ready for operation after the drive controller starts up, even
with timeout activated it will take about 5 seconds until monitoring starts. This
leaves a somewhat longer start-up time for the device being evaluated (control
unit or other drive controller) before the fault is triggered.
H126
X120-SSI-data bits
version 0
H127
SSI clock frequency
version 0
H128
X120 double transmission
version 0
Information
If the hardware that is used allows it, double transfer should not be
deactivated.
H129
X120-Info
version 0
H130
X120-encoder simulation line count
version 0
H132
SSI-timeout
version 0
