ebm-papst Kickstart - Manual (Page 24)

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6 Kickstart Modules
6.5.2 Configuration
After dragging a Data Object from the Object Editor and dropping it on the configuration table, you can use the following fields to configure
the data processing within the Scope module.
Sampling and Rate
This defines how the values for the data logging and scope are obtained.
Sampling Description
Off Sampling is disabled or inactive
Software
Kickstart sends out SDO Upload requests to the node ID,
using the fixed time interval of
Rate milliseconds.
TPDO..
The object is available through Transmit PDO (1..4).
Within the PDO frame, the data required starts at byte
position (0..7) and is (1, 2, or 4) bytes
large. Example:
TPDO3.0.2 (The value is a 16-bit value obtained from the
first two bytes of Transmit PDO 3)
RPDO.. Same as TPDO, but for Receive PDO
NOTICe
The TPDO and RPDO methods are passive sampling methods. They do not perform the actual device PDO configuration
(PDO mapping) and do change the CAN node state using NMT. They are safe to use within a running CANopen applica-
tion.
Scaling
Allows scaling and processing the raw data values. You can use a simple factor or more complex formulas, including offsets or even
non-linear transformations.
examples:
Scaling Description
0.25 Scale the value by 0.25 (i.e. the displayed value is four times smaller than the raw data value).
100 Scale the value by 100 (i.e. the displayed value is multiplied by 100).
= x / 65536 + 10 Divide raw data value by 65536, then add 10.
= 1 / x
Non-linear expressions like this are possible, too. However watch out for invalid results, e.g.
“division by zero”. Kickstart will display these values as “0”.
NOTICe
The scaling is only applied to the displayed value, not to the recorded raw data. This means you can apply a different
scaling expression at a later point (when loading the data using Open), or to rescale all data “on the fly”.