FDI2056 Use
r’s Manual
v 2.0 r 1.1
– 03/13
Copyright © 2013 Metrolab Technology SA
60
www.metrolab.com
The End Of Data string (default Ctrl-Z) is emitted immediately after the last data
value. The End Of Data string can be programmed with the
EOD
command (see
section 4-11-6).
Note: If the External Trigger is used, then the measurement cycle must be
terminated by the
BRK
command. This will end the cycle and allow the
data to be read in the Block Transfer mode.
Important Note:
This mode is incompatible with
CUM,1,L
and therefore
cannot be executed in this case.
End of Data (EOD)
4-11-6
The End of Data string (sent by the instrument when the buffer is empty and the
host requests to read data) can be programmed by the host computer. By default
the End of Data string is the character Ctrl-Z (ASCII 26). The EOD command
allows the End of Data string to be modified to contain one or more characters.
The EOD command parameters are decimal ASCII codes separated by commas.
Example:
Following the reception of the command
EOD,69,109,112,116,121,13,10
CR
LF
the FDI 2056 will reply
Empty
The maximum length for the End of Data string is 20 characters. If the
EOD
command is executed without any parameters, the default string (Ctrl-Z) is
assumed.
Interrupting a measurement cycle (BRK)
4-11-7
It may be necessary to stop the measurement cycle once it has begun. This may
be because of a programming error in the cycle itself, or simply to restart a new
cycle without waiting for the present one to end (the
RUN
command being ignored
during the measurement cycle). To abort the measurement cycle, the host should
execute the
BRK
command.
This command is also used to stop measurements when external triggers are
used -
TRS,X
-. In this case bit 3 of
STATUS
1 (End of Run) is set.
Using the
BRK
command has the following effects:
The measurement cycle is terminated.
The motor (if it is operational) is stopped irrespective of the commands
used to start it -
MOT,+
,
MOT,-
or
MOT,A
-.
The external trigger input is disabled.
All data measured up to the instant that the
BRK
was received are valid
and can be read by the host.
The FDI 2056 can also execute a
BRK
automatically if any of the following errors
occurs: