Added omron plugins

[ros2torial]

Added

• Omron_NX_ECC201_NX_ID5442: Omron EtherCAT Coupler NX_ECC201 with Input module NX_ID5442.
• Omron_NX_ECC201_NX_OD5256: Omron EtherCAT Coupler NX_ECC201 with Output module NX_OD5256.
• Omron_NX_ECC202_NX_ID5142_1: Omron EtherCAT Coupler NX_ECC202 with Input module NX_ID5142_1.
• Omron_NX_ECC202_NX_OD5256: Omron EtherCAT Coupler NX_ECC202 with Output module NX_OD5256.

Here coupler and input/output modules can't be separated like Beckhoff since running the ethercat slaves command shows only the coupler in case of omron.

[mcbed]

Thanks @ros2torial ! So if I get it right, you need to write a new ec plugin for each configuration of your bus as you can't decouple the modules ?

[ros2torial]

yes. I tried decoupling the modules like Beckhoff but it is not possible with omron coupler. Here if only one input(i.e. NX_ID5442) and one output module(NX_OD5256) is connected to omron coupler then we can use the added plugins in moduler way. This I have tested thoroughly.

[mcbed]

Ok thanks @ros2torial , I will merge as is and we may reopen if someone has a better idea.