INFICON Cube CDGsci (RS232 ASCII) - Manual (Page 4)

4
tira89e1-a (2014-03) RS232 ASCII.cp
1 Interface Protocol
Commands are send to the Cube gauge as an ASCII string. Each command is
terminated with an CR/LF.
The input of only the command results in Cube sending the actual value of the
parameter corresponding to the command (read access). The value is transmitted
as an ASCII string terminated with a CR/LF.
The input of the command with a trailing parameter value will result is a writing
attempt of the value into the corresponding parameter on the Cube. If successful,
the string "o.k." is transmitted back, otherwise an error message will result.
The data type in the parameter table 1.2 indicates how the string can be inter-
preted. The column "Access Rights" denotes if the command is read only ("R") or
has a write and read access ("RW").
100 ms for pressure values
200 … 1000 ms for other information or write commands
Command: AUN (displays / sets the currently set pressure unit)
Possible parameter values: mbar, Pa, Torr
Entry of command without parameters displays the current unit:
Cube> AUN
Torr
Cube>
Entry of command with parameter sets Cube to the specified unit:
Cube> AUN mbar
o.k.
Cube>
Entry of command with not recognized / allowed parameter results in an error:
Cube> AUN psi
Value does not fall within the expected range
Cube>
If unsure about the parameters, the help function will display them:
Cube> HLP aun
Device unit, 0=mbar, 1=torr, 2=pa
Cube>
Write commands that do not have a parameter list need a trailing zero.
Command: ZAD (performs zero adjust at base pressure)
Cube> ZAD 0
O.k.
Cube>
1.1 Send and Receive
Response time
Example 1
Example 2