VACUUBRAND MV 2 VARIO - Manual (Page 27)

page 27 of 41
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check
carefully the validity of this document with respect to his product. manual-no.: 999035 / 15/12/2009
Write commands
Function Command Parameter Description
remote operation* REMOTE X 0: set controller to local operation
1: set controller to remote operation
preset pressure OUT_SP_1 XXXX unit according to preselection
(set point p) (0001 to 1060 mbar (hPa) or 0001 to 0795 Torr)
(only setup TURBO•MODE: setting
0000 corresponds to ”Lo”)
preset pressure OUT_SP_V XXXX unit according to preselection
(set point p) with venting** (0001 to 1060 mbar (hPa) or 0001 to 0795 Torr)
(only setup TURBO•MODE: setting
0000 corresponds to ”Lo”);
only possible if process control is active
selected pumping speed OUT_SP_2 XX.X Hz (01.0 to 60.0 in steps of 0.5 Hz)
(setting 99.9 Hz corresponds to ”Hi”)
operation mode OUT_MODE X 1: continuous pumping
2: pressure control
4: TURBO•MODE
driving air admittance OUT_VENT X 0: close air admittance valve (not automatically)
valve 1: open air admittance valve (process control
stopped)
starting process control START
stopping process control STOP X 1: termination of process control
2: termination of process control and storage of the
actual pressure as new set point
The single abbreviations of a command are separated by underscores (ASCII 5FH).
Command and parameter are separated by ignore characters (ASCII 20H).
The string is terminated with (ASCII 0DH, ASCII 0AH).
Connector assignment
2: RxD
3: TxD
4: DTR
5: Mass
7: RTS
8: CTS
** Pressure setting with venting is only possible in operation mode ”Pressure control” if an air admittance
valve is connected and configurated and pressure control is started. The air admittance valve opens
automatically if the actual pressure is 10 mbar below the preset pressure. Automatic venting becomes
inactive if pressure control is stopped (STOP or VENT), setting a pressure value using the command
OUT_SP_1 or if the operation mode is changed. Activate the command OUT_SP_V again if necessary.
* If remote operation is selected or deselected, the user has to ensure that no dangerous status of the
system due to the change of the mode of operation can occur and to provide appropriate safety measures,
especially if selecting remote operation interferes with a locally operated active process.