I'm using a Compax 3S E31T40 (C3S150V4F10I31M00T40), dumbed down to a T11, for positioning of a servo drive over EtherCAT. I'm been able to communicate with the drive using the "C3_EtherCAT_full_2ms_V0209.xml" device description file. However, I am finding that I will need to set a few additional inputs/outputs via EtherCAT than what is contained within this device description (for example, setting tuning parameters such as x2101.1 - Feedforward-Speed). I tried adding this to the XML under the RxPDO outputs section directly below the existing entries in that section, but run into an error when I try to deploy it and can't switch to operational state. I'm new to editing EtherCAT description files, so I'm unclear if what I'm trying to do is even possible, or if how I am going about it is the correct way. Any advice will be greatly appreciated.
Side question: what does VP in the Valid after column of the EtherCAT object table stand for?