Computer interface
GA 09.035/6.02 - 07/2011 - © Oerlikon Leybold Vacuum
57
6
Computer interface
6.1
Basics
6.1.1
Connection
The Multi-Channel Controller is able to communicate with a computer via a
serial interface (RS232C). The connection socket and the required connection
cable are described in Chapter 3.3.7 RS232C,
6.1.2
Nomenclature
The following terms and symbolic styles will be used in the description of the
computer interface:
Tab. 6-1
Terms
Square brackets [...]
Square brackets identify optional parameters. The items enclosed by the
brackets may appear, but they are not essential. The brackets are not actually
used in the command.
Angle brackets <...>
Abbreviations enclosed by angle brackes identify control characters. The
entire expession including the brackets is replaced by a numerical value. See
Tab. 6-2,
57.
Tab. 6-2
Control characters
Term
Significance
Host
Computer or terminal
Sending (S)
Data transfer from the Host to the Multi-Channel Con-
troller
Receiving (R)
Data transfer from the Multi-Channel Controller to the
Host
ASCII
American Standard Code for Information Interchange
Term
Value
Significance
<EXT>
03h
End of text (Ctrl-C). Reset the interface. Delete
the input buffer.
<ENQ>
05h
Enquiry (Ctrl-E). Request data transmission.
<ACK>
06h
Acknowledge. Positive acknowledge.
<LF>
0Ah
Line feed. Line feed.
<CR>
0Dh
Carriage return. Carriage return.
<NAK>
15h
Negative acknowledge. Negative acknowledge.
