Hioki 3511-50, Instruction Manual, Page: 77 / 140

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6.3 Operation
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6.3.1 Communication Methods by the RS-232C
Command messages
Query messages
Messages
Program messages
Response messages
Computer
3511-50 Program messages
Response messages
6.3 Operation
In order to control the 3511-50 by the RS-232C, there are several kinds of
messages.
Of these, program messages are those received by the 3511-50 from the
computer, while response messages are those sent from the 3511-50 to the
computer.
(1) Program messages
Program messages are command messages or query messages.
Command messages are orders for controls of the 3511-50, such as for
making measurement condition settings or for reset or the like.
Example
:FREQUENCY <data>
(Command message which sets the frequency)
・
Query
messages
are orders for responses relating to results of operation,
results of measurement, or the state of 3511-50 settings. A question mark
"?" is suffixed at the end of the command.
Example
:FREQUENCY?
(Queries the current frequency)
(2) Response messages
It represents the response data for query messages from the 3511-50.
Example
:FREQUENCY 1000
(Current frequency is 1 kHz.)