Commissioning
EL500x136 Version: 3.6
Distributed Clocks
An SSI encoder should determine its position at the first falling edge at the Data input after the pause
("latching"). If DC (distributed clock) is activated (-> DC tab), the EL5001-0011 stores this time and transfers
it to the controller as a 32-bit or 64-bit value. To this end the corresponding process data must be activated
in the ProcessData tab and TwinCAT must be restarted or EtherCAT reloaded (button in the System
Manager).
In the SyncManager 3 the 64-bit timestamp can be activated with index 0x1A01 and the 32-bit timestamp
with index 0x1A02 (Fig. PDO change, switchover from 64-bit to 32-bit timestamp).
Fig.147: PDO change, switchover from 64-bit to 32-bit timestamp
Latch time
The EL5001-0011 can only determine the time at which the latch signal is present at the Data input.
The time it takes for the encoder to latch its position depends on the encoder type. For further de-
tails please contact the encoder manufacturer.
Process data
The SSI data are transferred to the controller via the 32-bit "CounterValue" process data.
"Data Error" may indicate:
• incorrect polarity: signal levels are incorrect during the pause time.
• incorrect telegram length.
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