XITRON 2000I, Руководство пользователя

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Interface Operation 81
Reading Data Via an Interface
With either interface, you can read the data presently being displayed on the
front panel of the 2000 instrument. With the RS-BAT interface this is
achieved by transmitting the @ character to the 2000 instrument, with the IE-
BAT interface this is achieved by simply reading the instrument. In either
case, the instrument responds by sending a single
space character, followed
by the 16 character display string, and terminating by the carriage return and
line feed characters (with the IE-BAT interface this last character is sent with
the EOI line asserted).
Sending Data Via an Interface
Both the RS-BAT and IE-BAT interfaces operate similarly with regards to
sending data to the instrument. The only difference is the requirement to
place the instrument in the “REMOTE”
state when using the IE-BAT
interface. Characters transmitted to the interface are stored in a buffer until a
line feed character is received, or until a character with the EOI line is
asserted (in the IE-BAT interface).The received characters are then decoded
and actioned.
Up to 30 characters may be stored in the receive buffer , which may contain
more than one complete command string type, as desired.
Command Set for the 2000 Instrument
The 2000I or 2000M instrument command sets are split into two groups:
•
The commands, which correspond exactly to individual front panel key
presses—to allow the same procedure to be followed, whether the
instrument is being used locally or remotely. See Table 4
•
The shortcut commands—that allow certain commonly used functions to
be easily accessed by remote commands. See Table 5.
Keypress, Simulation Command Characters
The characters received from the interface that correspond to individual front
panel keys are shown in Tables 4 and 5.