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EtherCAT Master Unit - Slave Unit
Communications
The MG80-EC has the two communication modes of FREE RUN mode and DC
mode for EtherCAT communications between the master unit and slave unit.
(1)
FREE RUN Mode
In the FREE RUN mode, a slave unit operates asynchronously with the
EtherCAT master unit.
(2)
DC Mode
In DC mode, slave unit communicate and operate synchronously with
the EtherCAT master unit.
A mechanism called distributed clock (DC), where the EtherCAT master
unit and slave unit share the same clock, is used for synchronization.
Each of the DC mode-ready slave unit connected to EtherCAT shares the
clock information. The input/output timing is synchronized with other
slave unit by generating interrupt signals and executing input/output
processing inside each slave unit according to the clock.
The DC mode supported by the MG80-EC is “DC mode 1.”
Communications cycle
The communications cycle is determined by setting output frequency of
Sync0 signal (interrupt signal in DC mode 1).
* The communications cycle settings are performed on the host device side
(EtherCAT master unit). For the setting method, refer to the manual of the
EtherCAT master unit to be used.
The minimum communications cycle time of the MG80-EC is 2 ms.
Содержание MG80-EC
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