SCHOTT TW alpha plus Mode D'emploi page 26

Command Response
aaRB Check for presence of a beaker glass
if no beaker glass is present:
aaRC Repeat last command; however, the last
command will not be executed again
aaDQ Rotate plate by one position, irrespective of the head position
aaSH Immediate stop of all processes and movements
aaSC Continue all processes and movements
which were stopped with the aaSH command
aaSR Immediate stop of all processes and movements;
all processes and movements are reset to basic state
99AAzz Serial numbering of all devices within the daisy-chain
The first device in the chain will be assigned the zz address. The next
following device will get the zz+1 address.
If zz=15, the next device will be assigned the zz=1 address
All devices respond with their new address
99AB.. Send any command to all devices
all devices will respond to the command specified after <99AB>
Example: 99ABVE will return the version numbers of all connected devices.
Reply from the TW alpha plus
aaERROR:KEIN BECHER
„last command "
aaY
aaY
aaY
aaY
aaY
zzY