Sigma LBA-400, LBA-710, LBA-714PC, LBA-300 manual 10.6.2.1 FRM? Download Data Frame, Frm?, Ldd, Sdd

FRM?	-	Download data file	(remote to host)
FRM	-	Upload data file	(host to remote)
LDD	-	File Load… data file	(loaded @ remote)
SDD	-	File Save As… data file	(saved @ remote)

The FRM command is used to download and upload LBA-PC data files. The transmitted data is in an internal binary form that is identical to a .LB3/4/5 data file. The format of this data is not documented. To use this command you must save and restore exactly what was received from the LBA-PC. Data downloaded with the FRM? command should be written to a file on disk with the extension .LB3/4/5. This data file can then be read by LBA-PC using the File Load… dialog box. To upload a data file, you must send exactly the binary data received in a previous FRM? command or exactly the binary data read from a .LB3/4/5 file written by LBA-PC.

The LBA-PC may also be configured to send a FRM? response each time a new frame of data is acquired (see A.5.4.6 FRM).

The LDD and SDD commands are used to tell the LBA-PC to read and write data files on the remote computer, (the PC where the LBA-PC application is running).

10.6.2.1 FRM? - Download Data Frame

To download an LBA-PC data frame, you must send the FRM? command with an optional parameter that identifies which frame you are requesting to transfer.

The frame parameter is optional and is numbered from -1 to n. ‘n’ is the number of frames in the frame buffer. Frame -1 is the Gain Frame, 0 is the Reference frame, and frames 1 to n are data captured in the frame buffer. If you do not send the frame number parameter then the current frame is used.

The LBA-PC responds by repeating FRM followed by a parameter specifying the frame number. Next comes the definite length specification that has the form:

#nd..d(DAB)…(DAB)

Where:

#= ASCII pound character (0x23)

n= ASCII decimal digit ranging from 1 to 9. This value specifies the number of digit elements, d..d, that follow.

d..d	=	ASCII decimal integer that specifies the number of data words that
		follow.
(DAB)	=	8-bit data byte.

The following example describes how the host controller requests and receives a data file containing frame 10. The data file contains 32,768 bytes.

Host Sends

:FRM?

FrameNumber=10(^END)

Operator’s Manual	191	LBA-PC
Doc. No. 10654-001, Rev 4.10