An older controller behind an RS232-to-Ethernet bridge returns the status frame
without its trailing FreqMax byte (11 bytes, not 12). The packet checksum is
still valid, so it's a real short frame, not a fragment. queryStatus now accepts
>= 10 bytes and defaults the missing FreqMin/FreqMax rather than rejecting it as
"too short", which reconnect-looped the link. Whether the byte LAYOUT is
otherwise identical across controller versions still needs confirming from the
protocol reference.