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Communications issues
The communications monitor function can be used to more easily check operation.
See: Instruction Manual "Displaying communications commands (command monitor function)"
Issue
The instrument is not
responding at all.
An error is being
encountered.
The instrument fails to
respond to queries.
Unable to switch the
multiplexer channel.
Unable to load
multiplexer.
Items to check
Display
[RMT]
is not
being displayed.
Display
Command error
Execution error
On the
No response
command
monitor
Response
Measurement leads are connected
to the measurement terminals on
the front of the instrument.
HIOKI RM3545E965-00
Possible causes
No connection has
been established.
The command isn't
being recognized as
a valid instruction.
The input buffer
(256 bytes) is full.
Receive 1 The
command string
is correct, but the
instrument is not able
to execute it.
Example
• When set during
scanning
• The data portion
was spelled
incorrectly.
:SAMP:RATE
"
SLOW3
"
The input buffer
(256 bytes) is full.
:TRIG:SOUR
The
EXT
setting is
being used, and
the instrument
is waiting for the
:READ?
trigger after
transmission.
There is a mistake in
the program.
Do not connect measurement leads to the measurement
terminals on the front of the instrument
when using the multiplexer.
17
Solutions
• Check whether the connector has
been connected.
• Check whether the interface
settings have been configured
properly.
• (USB) Install the driver on the
control device.
• (RS-232C) Use a cross cable.
• (USB, RS-232C) Check the COM
port number on the control device.
• (RS-232C) Use the same
communications speed for the
instrument and the control device.
• (LAN) Check that the IP address
does not overlap with that of other
network instruments.
The initial IP address for the
instrument is "0.0.0.0".
• Check the spelling of the command
(space: x20H).
• Do not append a question mark to
commands that are not queries.
• (RS-232C) Use the same
communications speed for the
instrument and the control device.
Insert a dummy query after sending
several lines of commands.
*OPC?
Example: Send "
" → Receive
1
"
"
Check the specifications of the
command(s) in question.
Insert a dummy query after sending
several lines of commands.
*OPC?
Example: Send "
" → Receive
1
"
"
Check the command specifications.
Check the receive portion of the
program.
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