Operation of EtherCAT and Interbus master on a PC

If the EtherCAT master and the Interbus master are operated on a PC via TwinCAT for test purposes, a collision of the startup timers of the two devices will occur when TwinCAT is restarted. For this atypical case the following start sequence should be followed:

Configure the EL6740-0010 in the EtherCAT device based on the above specifications, TwinCAT in Config mode/Free-Run.
Manual selective reload of the EtherCAT device.
Activate FreeRun. The EL6740-0010 is now in OP state.
Reset the Interbus master through a selective reset until "Reset started, Reset completed successfully" appears in the logger window.
Several attempts may be required. In order to facilitate the reset it may be helpful link any Interbus box with the Interbus master, followed by resetting and deleting of the Interbus box.
Initiate a "box scan" on the Interbus master, after which the Interbus slaves will be detected.
Restart TwinCAT in Config mode/FreeRun. Data transmission can now be tested.
Use the configuration in Run mode.

To operate the EtherCAT master and the Interbus master on the same PC permanently, it is advisable to use software-based process data transfer via TwinCAT or ADS, rather than a hardware link via the Interbus.

An example configuration with an Interbus master card "IBS PCI SC/I-T" appears in the System Manager as shown in Fig. Selective reload of the EtherCAT device.

Operation of EtherCAT and Interbus master on a PC 1: — Example configuration of EtherCAT and Interbus master on the same PC

Data that are output by the PLC via the output process data of the EL6740-0010 "Variable 4..6" are transported via the Interbus and appear as "Word0..2" in the Interbus device.