Hioki 3174 - Output Queue and Input Buffer

9.3 Communication Methods
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Output Queue
Response messages are stored in the output queue until read by the controller.
The output queue is also cleared in the following circumstances:
• Power on
• Device clear
• Query Error
The output queue capacity of the instrument is 120 bytes. If response messages
overflow the buffer, a query error is generated and the output queue is cleared.
Also, with GP-IB, if a new message is received while data remains in the output
queue, the output queue is cleared and a query error is generated.
Input Buffer
The output queue capacity of the instrument is 60 bytes. When the input buffer
receives data that exceeds 60 bytes and becomes full, the GP-IB interface buss
waits until buffer space becomes available.
RS-232C does not receive data that exceeds 60 bytes.
9.3.2 Output Queue and Input Buffer
Ensure that the no command ever exceeds 60 bytes.