Hioki BT4560 - Page 126

120
Troubleshooting
Concerning communication items
The operation can be checked smoothly by using the communication monitor (p. 72).
No. Trouble Conrm Possible causes → Solution Ref.
4-1
There is no
response at all.
Display
[RMT] is not
displayed.
Connection cannot be established.
→ Check the connector insertions.
→ Check that the settings of the interfaces
are correct.
→ Do not insert a USB cable when RS-232C
is used.
→ When using the USB, install drivers on
control instruments.
→ Use the cross cable when RS-232C is
used.
→ Check the COM port number of the
control instrument.
→ Match the communication speeds of the
instrument and the control instrument.
p. 95
[RMT] is
displayed.
Commands are not accepted.
→ Check the delimiter of the software.
p. 95
4-2
Result becomes
an error.
Display
results in a
command
error.
Commands do not match.
→ Check the spelling of the commands
(space is x20H.)
→ Do not add “?” to commands with no
query.
→ Match the communication speeds of the
instrument and the control instrument.
−
Input buffer (256 bytes) overow.
→ Ensure waiting until the received
character string is processed.
Example: Insert a dummy query for sending
several lines of commands such as
*OPC?
Sending → “1” reception.
−
results in an
execution
error.
Not in the state in which execution is
possible, though the command character
string is correct
Example: Spelling mistake in data part
:SAMP:RATE SLOW2
→ Check each command specication.
−
Input buffer (256 bytes) overow.
→ Ensure waiting until the received
character string is processed.
Example: Insert a dummy query for sending
several lines of commands such as
*OPC?
Sending → “1” reception.
−
4-3
An answer to
the query is not
returned.
On the
communi-
cation
monitor
response
present.
The program is not correct.
→ The instrument is returning the query.
Check the receiving part of the program.
−