FAQ: What could cause motion commands sent to an EtherCAT axis to be executed by a different axis than intended?
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With an EtherCAT configuration, the connection order of the servopacks is important. EtherCAT Input should be connected to CN11A and EtherCAT Output to the next servopack in the network should be connected at CN11B. If connections are interchanged after initial commissioning, like in the case of a servopack replacement, the master may reassign addresses in a different physical order at the next power-up.
To assist this situation, the servopack provides a means to set EtherCAT secondary addresses (aliases) via rotary dip switches S11 and S12. See Section 4.4.4 of the user manual for more information on these settings.
For more information refer to SIEPC72082904 the Sigma-5 User Manual: EtherCAT (CoE) Network Module.
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