Beckhoff EL1258, Документация

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Commissioning
EL125x, EL2258 123 Version: 2.5
For example, the process data of an input channel are represented as follows for MTSF = 1x, 5x and 10x:
Fig. 157: Different MTSF
For each event there is a bit in the input array (right-justified) and a timestamp.
These process data are placeholders that accept events if there are any to be transmitted.
If fewer channels are required, predefined PDOs are also available for 4, 2 or 1 channel(s), with an MTSF of
1x, 2x, 5x and 10x respectively.
If fewer events arrive at the input than defined by the MTSF, the remaining PDOs are set to 0, in order to
highlight this.
Example: NoOfInputEvents = 3 for MTSF=5 means that the first three PDO events (input value + timestamp)
are supplied, the remaining two PDOs are set to 0.
3. When should the filter in CoE be activated? (default: deactivated)
The filter can be used to hide short signal jumps (spikes). They are regarded as invalid.
Procedure:
- The filter can be activated via the CoE 0x80n0:01 EnableDigitalFilter.
- If the filter activated is, the object 0x80n0:14 DigitalFilterCounter is used to set the timeframe over which
the signal is regarded as valid. The timeframe should be specified as number of microcycles. “1” is
synonymous with a deactivated filter.
- Finally you must check whether the macrocycle time achieved in the terminal with the selected settings is
shorter than the EtherCAT cycle time.
- In online mode the current microcycle time can be viewed in the CoE.
Fig. 158: Setting in CoE x80n0:01 & x80n0:14 for digital filter
Finally you must check whether the macrocycle time achieved in the terminal with the selected settings is
shorter than the EtherCAT cycle time. This should generally be 20% longer than the macrocycle. The current
macrocycle time can be read in the CoE directory
0xF900:08 CycleTime .
4. How can I test the input channel?
If an input channel is to be tested, the events are hardly visible in the System Manager, since in synchronous
mode (default) they are immediately retrieved, and the process data always look "zeroed".