Hioki ST5540 - Output Queue and Input Buffer

8.4 Command Message Description
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Chapter 8 Controlling the Instrument From a Computer
Output Queue Response messages accumulate in the output queue and are read out as
data and cleared by the controller. The output queue is also cleared in
the following circumstances :
• When the power is turned off and turned on again.
The HiTESTER has an output queue of 1k byte capacity. If the response
messages overflow this limit of 1k byte, a query error is generated, and
the output queue is cleared.
Input Buffer The HiTESTER has an input buffer of 1k byte capacity.
The RS-232C and USB does not accept data in excess of 1k bytes.
Output Queue and Input Buffer
The length of a single command should be less than 1k bytes.