INFICON XTM/2 Thin Film Deposition Monitor - Manual (Page 71)

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XTM/2 Operating Manual
IEEE488 FORMAT (Message Protocol)
To XTM/2: message_string LF d10 (CHR$10)
From XTM/2: message_string LF (if success)
- or -
error_code LF (if failure)
SECS FORMAT (Message Protocol)
To XTM/2: NN SECS_10_BYTE_HEADER message CS CS
From XTM/2: NN SECS_10_BYTE_HEADER ACK message CS CS
(if success)
- or -
NN SECS_10_BYTE_HEADER NAK error_code CS CS
(if not)
If there is a problem, the unit will return a NAK preceded by one of the following
Error Codes:
A. . . . . . . Illegal command
B. . . . . . . Illegal Value
C . . . . . . Illegal ID
D . . . . . . Illegal command format
E. . . . . . . No data to retrieve
F . . . . . . . Cannot change value now
G . . . . . . Bad checksum
NOTE: When transmitting commands directly by typing on a keyboard, the
entire command, including the "ACK", must be entered quickly.
Otherwise, the instrument will fail to recognize the transmission as a
valid command.