... Axis Controllers . ... Guider Image Controller Commands . ... Multiple controllers (except the guide image controller) may co-exist in one box and share one serial interface. ... Some of these rules only apply to commands that the TCC may execute, and so may be relaxed for engineering commands. ... The command echo should be in the same case as the received command. ... Note: The Galil motion controllers output a semicolon for each command that appears on a line (as part of the command echo). ...