There aren't that many undocumented host link commands that are needed by normal users. Command such as the "$cKILL" was used by TRiLOGI version 4 due to its support of "access protection password" feature. We decided not to carry this feature to version 5 to avoid confusing novice user, who already have to deal with the TLServer password and the SETPASSWORD command. But I guess in future we may add the password clearing feature to TLServer to address problem caused by corruption of EEPROM.
Newer T100MD+ firmware (r47 and above) supports several hostlink commands not available to earlier firmware version. The most significant additions are the "RXI", "RX$", "RA" and "WA" command which are not supported in earlier firmware version.
Please check the link:
http://www.tri-plc.com/MD-man.pdffor the current version of T100MD+ User Manual in case your printed manual is not up-to-date and does not contain the abovementioned host link commands.
Note that since T100MD+ also support OMRON C20H protocol, you can use OMRON protocol to achieve multi-channel read and write in a single command. This is also detailed in the abovementioned user manual.