Function extension:
The EtherCAT bus coupler EPM-S131 fully supports the 'Distributed Clocks' (DC) functionality.
It enables exact time synchronisation for applications in which several axes perform a coordinated movement at the same time. The data transfer takes place synchronously with the PLC program. With DC synchronisation, all slaves are synchronised with a reference clock, the so-called "DC master".
The EtherCAT bus coupler EPM-S131 is also DC master-capable.
Note: An evaluation of the recorded time stamps is only possible within a bus system. The IO modules with time stamps must either all be connected to the EtherCAT or all to the backplane bus. No time stamps (e.g. with MC_Touchprobe, L_MC1P_FASTOutput, L_MC2P_TappetRegister) can be evaluated if the IO modules are connected to EtherCAT and backplane bus in a distributed manner.
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IO modules with time stamp
| Description
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EPM-S207
| DI 2xDC 24V ETS
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EPM-S208
| DI 4xDC 24V ETS
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EPM-S310
| DO 2xDC 24V 0,5A ETS
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EPM-S311
| DO 4xDC 24V 0,5A ETS
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EPM-S600
| Counter-Modules Advanced 1x32Bit
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EPM-S602
| Counter-Modules 5V Differential 1x32Bit
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EPM-S604
| SSI-Modules
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DC synchronisation ensures that the bus cycle task of the master and the slaves run phase-synchronously:
Within a bus cycle, the transfer of the setpoints and the recording of the actual values in the field devices always takes place at exactly the same time.
Contained in which products?
I/O system 1000 EPM-S131 (bus coupler EtherCAT) as of output status : HW/SW 1A.40 with device description version as of 1.105.0.67 (PLC Designer).
For some I/O modules, the function is only available from a certain HW version. See attachment "EPM-S131 - DC-Sync - Required HW version.xlsx".
Automatic Translation
