Argantix KDC 80-62 Manuel d'utilisateur télécharger pdf (Page 37)

Programming Manual

Query Syntax MEASure:ARRay:CURRent[:DC]? [<n>,<n>]

FETCh:ARRay:CURRent[:DC]? [<n>,<n>]

Parameters Optional block and offset parameters <n>,<n>. Where the first value

<n> is the number of 256 sample blocks to transfer and the second

value <n> is the first block (offset) to start with. Number of blocks is

from 1 to 16, offset is from 0 to 15.

Examples MEAS:ARR:CURR? FETC:ARR:CURR? 4,0

Returned Parameters <BNRD> 4096 data points in arbitrary block data format

Related Commands MEAS:ARR:VOLT SENS:SWE

MEASure:ARRay:MODE

This command selects the waveform array data format to be used. The default mode is binary

(BIN) which uses an IEEE floating point data format in which each data sample is transferred as

a 4 byte floating point binary data word. Alternatively, an ASCII format may be selected (ASCii)

in which each data sample is sent as 8 ASCII Hex values representing the 4 byte IEEE floating

point data. Note that the transfer mode only applies to measurement array queries. All other

measurement queries always return ASCII data. Note that at power on, the default mode is

always set to binary (BIN).

Syntax MEASure:ARRay:MODe

Parameters BIN | ASCii

Examples MEAS:ARR:MOD ASC

Related Commands MEAS:ARR:VOLT MEAS:ARR:CURR

Note: The MEAS:ARR:MOD command is provided to allow waveform data transfers in ASCII on

DBCS versions of MS Windows. Examples of DBCS versions are Chinese, Korean, Japanese

etc. On most Windows versions, the binary mode can be used as it reduces the amount of data

transferred and thus provides better throughput.

Note: KDC units with firmware revision 1.06 through 1.12 have a parser error that requires

different parameters to be sent with the MEAS:ARR:MOD command. For units with this firmware

revision, use MAST instead of BIN and use APAR instead of ASC.

The ASCII mode will double the number of characters transferred so provisions for a larger

receive buffer on the PC may have to be made. In binary mode, the maximum data size for the

complete acquisition buffer is 16KB. In ASCII mode, the maximum data size for the complete

acquisition buffer is 32KB. The block size and block offset parameters may be used to reduce

the amount of data transferred if the entire acquisition buffer is not needed by the end-user or

application program.

Acquisition data is fomratetted in an IEEE floating point format to reduce data size. The following

VB6 sample program illustrates how to convert to native floating point data formats.

Conversion function sample VB6. Converting waveform data from either transfer mode to a

single precision value can be accomplished using the following sample routine:

Public Function StringToIEEEFloat(ByVal sData As String, ByVal bAsciiMode As Boolean) As

Single

'=============================================================

'bAsciiMode flag is used if data is received as 8 ascii chars

'representing Hex 0-9,A-F. If bAsciiMode flag is false, then

'data is process as 4 char representing a byte each. Ascii

'mode is needed for DCBS windows

'=============================================================

Dim i As Integer

Dim j As Integer

Dim iChar As Integer

Dim expo As Long

Dim mantisse As Long

36 KDC Series DC Power Supplies

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 119 120

Commentaires sur ces manuels

Pas de commentaire

Argantix KDC 80-62 Manuel d'utilisateur Page 37

Commentaires sur ces manuels

Produits connexes et manuels pour Unités d'alimentation électrique Argantix KDC 80-62