
8.4 Command Message Description
146
Various messages are supported in order to control the HiTESTER
through the interface.
Messages are divided into program messages, which are sent to the HiT-
ESTER from the PC, and response messages, which are sent to the PC
from the HiTESTER.
The message system has the following hierarchy.
Program
Message
Program messages can be divided into either command messages or
query messages.
• Command Message
Orders for controls of the instrument, such as for making measurement
condition settings or for reset or the like.
Example
:EQUIPMENT CLASS1
(command for setting the grounding class of equipment under test)
• Query Message
Orders for responses relating to results of operation, results of mea-
surement, or the state of device settings.
Example
:EQUIPMENT?
(command for querying the grounding class of equipment under test)
Response
messages
After a query message has been received, a response message is pro-
duced the moment that its syntax has been checked.
Whether or not headers are prefixed to response messages is set by the
"HEADer" command.
Header ON
:EQUIPMENT CLASS1
Header OFF
CLASS1
(grounding class of equipment under test is set to Class I)
After power-on, Header OFF is selected as a default setting.
If an error occurs when the query message is received, the query does
not produce response message.
8.4 Command Message Description
ST5540 or ST5541
Program messages
Response messages
Program messages
Response messages
Messages
Command messages
Query messages
Message Format
Header portion Space Data portion
Header portion Question mark
Summary of Contents for ST5540
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Page 6: ...Contents iv Index i ...
Page 29: ...23 2 Chapter 2 Instrument Labels and Screens Instrument Labels and Screens Chapter 2 ...
Page 80: ...4 8 Changing the Measurement Method Auto Manual 74 ...
Page 121: ...115 8 9 7 Chapter 7 Instrument System Settings Instrument System Settings Chapter 7 ...
Page 144: ...7 14 Setting the Backlight 138 ...
Page 284: ...10 14 Measurement Networks 278 ...
Page 290: ...11 4 Instrument Disposal 284 ...
Page 320: ...Appendix4 External Dimensions A30 ...
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