86
2553/ 2553E Command Guide
I sent the command CLR-INRUSH
;
MEASURE=START, but I get a
COMMAND ERROR message.
The correct separator between commands is the semi-colon, not the colon character.
Whenever a command error is reported by the 2553/ 2553E, the user should carefully
check the syntax of the commands sent to the 2553/ 2553E. Common problems are –
1.
Using the colon character instead of the semi-colon character between commands.
2.
Using an incorrect character between data (e.g. for the DISPLAY command) or
between measurement result definitions for the BANKn= command. In these cases
the separator should be the / character (not the \ character).
3.
Using a space character as a command separator. All whitespace characters are
ignored by the 2553/ 2553E, thus these cannot be used as separators.
I have carefully checked my command syntax, but I still get a
command error.
1.
Check for a colon character (incorrect) that “looks like” a semi-colon character
(correct). Some controller displays make it difficult to tell the difference.
2.
Some (mostly very old) controllers and/or controller software used an ASCII only
format on the bus and allowed the use of the most significant bit as a parity bit.
Although the 2553/ 2553E only uses the 7-bit ASCII command set, it does check the
entire set of 8 bits of the IEEE488 data bus. Check if the use of the most significant
bit for parity can be disabled.
After a READBANK or BANKn command, how long do I have to
delay before the new data is available?
The 2553/ 2553E automatically switches to the new bank or results after a READBANK
command is received, and automatically changes the results in a bank when the BANKn
command is received. In both of these cases the user does not need any delay after
sending the command. Of interest, the reception of either of these commands forces an
update of the affected bank of results and can be used to ensure that the latest data is
returned.
When I plot Waveform (or History) data received over the IEEE488
bus, it looks different than on the 2553/ 2553E display.
The waveform and history data transmitted over the IEEE488 bus has 200 point
horizontal resolution and virtually infinite vertical resolution. The display of the 2553/
2553E has substantially reduced resolution over these and thus can look different. This is
particularly the case for captured waveforms, where the display has substantially reduced
resolution in both time and amplitude thus cannot accurately display fast or small
glitches.
Summary of Contents for Xitron 2553
Page 1: ...IEEE488 COMMAND GUIDE 2553 2553E Three Phase Power Analyser ...
Page 2: ......
Page 10: ...10 2553 2553E Command Guide ...
Page 38: ...38 2553 2553E Command Guide ...
