industrialNETworXnetx

| 15.10.2008 | 12:15 | 1 reply

Master to master communication

Hello,
EtherCAT technology exhibits non traditional communication model (master to master, slave to slave). Is it possible to implement them, in particular master to master, with EtherCAT master stack into a comX device. Our architecture could be:
- host A = a linux based host, running a master stack code
- slave devices = A1, ... Ai under the control loop of master A
- host B = a house made device integrates a comX running EtherCAT master stack
- slave devices = B1, ....Bj under the control loop of master B

We would like to introduce a communication between master A and master B. Master B has to be considered as a slave of A for some IO constrained cyclic data (not acyclic data for diagnostic or some other reason).
Internet ressources about EtherCAT (but other fieldbus too !) are focused on traditional master/slave control loop, so we don't have the EtherCAT knowledge of master to master semantic and/or implementation stuff.

I wonder if considering 2 interfaces (in other words, to integrate 2 comX in host B) would not be simpler than dealing with master to master problem. I.e:
- host B becomes : comX-1 with EtherCAT master firmware and comX-2 with EtherCAT slave firmware. Consequently host B is considered as slave device Ax of master A

Any advice please on such an architecture ?

Thanks you.
Manfred.

Andreas Jacob

Andreas Jacob

Hilscher Gesellschaft fuer Systemautomation mbH

| 15.10.2008 | 14:30

Hello,

the master to master communication feature is not supported.
Further more you are unable to realize a master to master communication with a comX board. The comX module is only with two Ethernet port equipped.

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