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5
Communication with the TW 7200
5.1
RS command list of the sample changer TW 7200
The TW 7200 sample changer has a series of commands with the help of which it can be controlled by the
TitriSoft titration software. If own application programs are to be created, the commands given below must be
used.
All commands have the form: "address" (two digits); "command"; "CR"; "LF".
The address is used to address the correct device. Several devices, which have an addressable RS-232-C
interface, can be connected to one PC. The addresses can be 00 to 15. In the following list the addresses are
marked with "aa" in the general form.
Command
Description
aaGT
Query of the set sample tray
gg = total position / zz = inner positions / cc = ID
aaSCN
Automatic determination of the placed sample tray size
aaDV
Rotate the sample tray one position further
aaDR
Turn the sample tray back by one position
aaDPzz
Turn the sample tray to the specified position (zz = 1 to sample tray max.).
aaPO
Query current sample tray position
aaKPzzz
Move titration head to absolute head position in percent (zzz = 0 - 100)
no cup check when moving the head
aaGK
Query titration head absolute head position (zzz = 0 - 100)
aaKEA
Activate titration head end position up
aaKEE
Activate titration head end position normal (
aaKH
Lift the titration head up to the set limit switch
aaKR
Lower titration head,
if no beaker available:
aaKGzzz
Move titration head downwards relatively as a percentage of the total travel
(end position top to bottom) (zzz = 1 - 100)
if no beaker available:
aaKUzzz
Move titration head upwards relatively in percent of total travel (end
position up to down) (zzz = 1 - 100)
aaQSz
Set stirring stage for rod stirrer and magnetic stirrer (z = 0 - 9)
aaQA
Switch off the rod stirrer and magnetic stirrer
aaQDzz
Preset magnetic stirrer speed (100 to 900 rpm)
aaGQ
Read out magnetic stirrer speed actual value (zzz = rpm)
aaQRSz
Set stirring stage for rod stirrer (z = 0 - 9)
"
"
center
)
Reply
aaGTgg;zz;cc
aaSCNgg;zz;cc
aaDV Y
aaDR Y
aaDP Y
aaPOzz
aaKP Y
aaGKzzz
aaKE Y
aaKE Y
aaKH Y
aaKR Y
aaKR ERROR:NO
BEAKER
aaKG Y
aaKG ERROR:NO
BEAKER
aaKU Y
aaQS Y
aaQA Y
aaQD Y
aaGQzzz
aaQRS Y
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