Hi Markus,
You are right, there is some weird bug in ASIAIR. When I monitored the protocol, I do not see slew commands at all when guide calibration starts.
The way pulse guiding is done is to set a slow slew rate (usually 0.1x to 1.0x sidereal) and the actual pulse are really a start-slew (North, South, East or West), wait X milliseconds, and send a stop slew. In the case of Calibration, X is that number of milliseconds in the "Calibration Step" field of the Guide Settings window.
The problem is that when I start calibration, I do not see any slew commands being sent to my simulator. In fact, the only movement I see is the natural star drift.
In my case, my simulator does not slew even after applying your sequence. It must have to do with some different way the real mount and the simulator initializes itself.
Interestingly, ASIAIR does ask for the guide rate from the mount when it first connect to the mount, but do not send a guide rate until you change it in the Telescope Settings window.
This is probably very different from the original poster's question, so I will stop hijacking his thread now. If I find some simple way to jar the ASIAIR into moving, I will start a different thread, and flag your user name.
Chen