How do ground controllers manipulate properly the robot probe Spirit on the Mars?

How do ground controllers manipulate properly the robot probe Spirit on Mars as it takes about 45 minutes for the radio signal to travel between the Earth and Mars? ...Especially when the robot probe comes across any emergency in its movement and the computer on-board cannot resolve it.|||The mars probes are semi-autonomous, with lots of built-in contingencies. For "emergencies", the basic response is to stop and await new instructions.|||Although initially the rovers had to be controlled manually, they were quickly reprogrammed to be somewhat autonomous. Otherwise they would never have been able to travel the long distances they have.|||The rover moves very slowly; it takes 60 seconds to move about 12 inches.|||computers