Hioki Super megohm SM7110 - Page 165

159
Troubleshooting
Communication items
The operation can be checked smoothly by using the communication monitor (p. 136).
No. Trouble Conrm Possible causes → Solution Reference
4-1
The instrument
refuses to
respond.
Display
[RMT] is not
displayed.
Connection cannot be established.
→ Check the connector insertions.
→ Check that the settings of the interfaces
are correct.
→ Before using the USB, install drivers in
the control instruments.
→ Use the cross cable when RS-232C is
used.
→ Check the COM port number of the
control instrument.
→ Conrm the communication speeds
of the instrument to that of the control
instrument.
p. 129
[RMT] is
displayed.
Commands are not accepted.
→ Check the delimiter of the software.
p. 129
4-2
Results in an
error.
Display
Results in a
command
error.
Commands are incorrect.
→ Check the spelling of the commands.
(A space is represented as the numeric
character reference x20H.)
→ Eliminate question marks (?) from
commands with no query.
→ Conrm the communication speeds
of the instrument to that of the control
instrument.
*1
The input bu󰀨er (256 bytes) overows.
→ Wait until the received character strings
are processed.
Example: Insert dummy queries, e.g.,
sending
*OPC?
and receiving “1,” every
time several lines of commands are
sent.
Insert a dummy query for sending several
lines of commands such as Send
*OPC?
> Receive “1”
Results
in an
execution
error.
The command string is correct, but the
instrument is not in a state to execute.
Example: When sending an unsettable
command during START.
→ Check each command specication.
The input bu󰀨er (256 bytes) overows.
→ Wait until the received character string is
processed.
Example: Insert dummy queries, e.g.,
sending
*OPC?
and receiving “1,” every
time several lines of commands are
sent.
4-3
An response to
the query is not
returned.
On the
communication
monitor
There is a
response.
The program is not correct.
→ The instrument returned the query.
Check the receiving part of the program.
*1: For details, refer to the Communication Command Instruction Manual on the accompanying CD.
12
Maintenance and Service