Configuration with KS2000
The Bus Coupler parameters can also be set via the KS2000 configuration software.
Auto-configuration
When starting, the USB coupler assigns an address in its input and output process image to the attached terminals.
Evaluating complex terminals
The Beckhoff Bus Terminal system makes a large number of different Bus Terminals available for the operation of sensors and actuators.
In general, a distinction is made between digital and complex Bus Terminals. Complex terminals include all terminals that exchange byte information with the Bus Coupler (e.g. analog terminals, communication terminals or terminals for incremental encoders).
If the Evaluation of complex terminals option is selected the Bus Terminals for this station are fully evaluated, which means that all the data related to the connected terminals is transferred in the USB coupler's process image. In the case of analog terminals (such as the KL3002) this means that control and status bytes are included in the transmission, and that the terminal exchanges both input and output data with the Bus Coupler.
The technical documentation for the relevant Bus Terminals provides information relating to the data representation of the individual channels.
TwinCAT 2.8 only supports compact mapping for the USB coupler!
Motorola format (complex terminals)
This option sets the representation format for the complex terminals. You can choose between Motorola format (active) and Intel format (inactive). Using the Motorola format indicates that the more significant data byte of data word is located at the lower address offset of the memory location. The arrangement is precisely the opposite under the Intel format.
Motorola format (digital terminals)
If you select the Motorola format for digital terminals, the high and low bytes of a word containing digital input data (i.e. from a total of 16 sequential digital channels) are swapped.
WORD Alignment
You must select the Word Alignment option if you wish to place a data word against a word boundary within the process image memory area (i.e. on an even byte address).
Free running input image
The coupler autonomously fetches the process input image from the input terminals. Updating the process image runs freely (asynchronously) with respect to the fieldbus. Data consistency is not ensured for all types of terminal!
Free running output image
The coupler autonomously (asynchronously) sends the process output image to the output terminals. There is no synchronization with the fieldbus cycles. Data consistency is not ensured for all types of terminal!