The ESU Ecos DCC Command Station is not the LokProgrammer. It is a fully compliant command station, and can perform all the same functionality as Digitrax, NCE, Lenz, etc., stations do.
From the ECoS manual (sure sounds exactly like my two Digitrax command stations):
18.4.1. Read CVs
Only possible on the programming track.
• Enter the CV number in field a), that you want to read.
• Push the screen button e) „Read CV”
• After a short while the current value will be displayed in field
b).
• If you were not successful „Error” or „No Loco” will be displayed.
„No Loco” means that no loco was found on the programming
track or that the current draw was below 4mA. Check the electrical
contacts.
ECoS tries first to read a CV in Direct Mode. If this does not
work ECoS attempts to read the CV in Paged resp. Register
Mode. This may take up to 30 seconds.