VXi VT1422A 사용자 설명서

returns 32,768 values if the FIFO buffer is at least 

half-full. This command provides a fast means of acquiring blocks of values from 
the buffer.

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For acquiring data from continuous scans, an application needs to execute a 

DATA:FIFO:HALF? command and a read statement often enough to keep up 
with the rate that values are being sent to the FIFO.

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Use the DATA:FIFO:ALL? command to acquire the values remaining in the 

FIFO buffer after the ABORT command has stopped execution.

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The format of values returned is set using the FORMat[:DATA] command.

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Returned Value: ASCII values are returned in the form 

±1.234567E±123. 

For example 13.325 volts would be +1.3325000E+001. Each value is followed 
by a comma (,). A line feed (LF) and End-Or-Identify (EOI) follow the last value. 
The data type is a string array.

REAL 32, REAL 64, and PACK 64, values are returned in the IEEE-488.2-1987 
Definite Length Arbitrary Block Data format. This data return format is 
explained in “Arbitrary Block Program and Response Data” on page 233. 
For REAL 32, each value is 4 bytes in length (the data type is a float32 array). 
For REAL 64 and PACK 64, each value is 8 bytes in length (the data type is a 
float64 array).

Values which are a positive overvoltage return IEEE +INF and a negative overvoltage 
return IEEE -INF (see Table 7-1 on page 294 for actual values for each data format).

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Related Commands: DATA:FIFO:COUNT:HALF?

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*RST Condition: FIFO buffer is empty

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Send with VXIplug&play Function: hpe1422_readFifoFast_Q(...)

DATA:FIFO:COUNT:HALF?

DATA:FIFO:HALF?