First time to try build my xml for not listed ethercat in-out component

Yeah... there is no contact with the ECL16DP. Only with the S1-M20.
What can you do? Power + ethernet connection. Maybe you can connect only the ECL16DP? Use the ETH0 port.
That new xml looks to be the same, except for the imagedata that looks intimidating. But it's just the bitmap of a picture that TwinCAT uses to display with the unit.

Really situation is these: S1-M20 is a coupler based on Hishler chips as multiprotocol demux. You can set from ethercat modbus and other .... there are not a real connection from DI, DO module. Hishler chips drive the right master in module with correct register used from various protocol type. So if bus is not inizialize on Hishler, no comunication with DI DO, no pdos no sdo .... only comunication established. Need to know right inizialization sdo i think, and producer not know that because not usual with IGH. Really not sure Hishler is supported from IGH. SO for sure need to load original xml file on tiwincat, after check if usable xml is produced .... but probabily need to write a new component based on file that producer share with me. For sure that "driver" as it is write is not possible to build inside ethercat component forlder ... wrong library used and wrong structures. If someone have some suggest on these (whitout writing new component ... that become a sort of copy of one used for EL1xxx or EL2xxx) is welcome.

Real thanks for attention on these.

You can't get the ECL16DP to show up on the ethercat bus?
This is the unit, right?
 
There sure seems to be an ETH1 and an ETH2.
There is nothing on "ethercat slaves" when you connect to ETH1 and power on?