Hioki 3541 - Communication Methods; Message Format

8.4 Communication Methods
100
Various messages are supported for controlling the instrument through
the interfaces.
Messages can be either program messages, sent from the PC to the
instrument, or response messages, sent from the instrument to the
PC.
Message types are further categorized as follows:
8.4.1 Message Format
Program
Messages
Program messages can be either Command Messages or Query
Messages.
• Command Messages
Instructions to control the instrument, such as to change settings or
reset
Example: (instruction to set the measurement range)
:RESISTANCE:RANGE 100E3
• Query Messages
Requests for responses relating to results of operation or
measurement, or the state of instrument settings.
Example: (request for the current measurement range)
:RESISTANCE:RANGE?
❖ For details: Headers (Page 101), Separators (Page 102), Data Formats (Page
103)
8.4 Communication Methods
3541
Program Messages
Response Messages
Program Messages
Response Messages
Messages
Command Message
Query Message
Header portion Space Data portion
Header portion Question Mark