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Symptom
Cause / Treatment
The RS-232C has stopped
working completely.
Are the cables properly connected?
Are all the devices powered on?
Has the communication condition been correctly set?
Transmission on the RS-232C
is not taking place properly.
Is the controller delimiter set correctly?
(Refer to Section 4.5, "Delimiter".)
When attempting to read data
using a BASIC INPUT
statement, the RS-232C bus
hangs.
Be sure to transmit one query before each INPUT statement.
Have any of these transmitted queries resulted in as error?
Although a command has been
transmitted, nothing has
happened.
Using the "
*
ESR?" query, inspect the standard event status
register, and check what type of error has occurred.
Using the "ERRor?" query, and check whether transmission error
occurred on the RS-232C.
The amount of data read in is
insufficient.
If the data includes one or more commas, then try using a LINE
INPUT statement.
Sending several queries,
produces only one response.
Has an error occurred?
Send the queries one at a time, and read the responses
individually.
When you want to read them in all at once, try doing so by
putting them all on one line separated by the message separator
character.
Chapter 7
Troubleshooting
If the RS-232C appears to be malfunctioning, refer to the information below
before calling for servicing.
