Yaskawa VCD 723 User Manual

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Operation

Upload/Download of Program/Parameters

9/15/93

Program upload is defined as the process of a computer sending the VCD 723
drive a new PAC program (i.e., the .PRG file) through the drive’s serial port .
This process may be required when upon application of power the drive finds
that the PAC program loaded into memory is invalid. This process may also be
used when it is desired to change the PAC program from what was previously
loaded. Some of the steps shown below are skipped when the PAC program in
memory is found to be invalid upon application of power.

Program download is defined as the process of the VCD 723 drive sending a
computer its PAC program (i.e., the .PRG file) through the drive’s serial port.
This process can be used for memory backup.

Parameter upload is defined as the process of a computer sending the VCD 723
drive all of its settable parameters (i.e., the .PAR file). This process can be used
to set up the drive with a set of tuned constants.

Parameter download is defined as the process of the VCD 723 drive sending a
computer all of its settable parameter values (i.e., the .PAR file). This process
can be used for memory backup. A parameter download is the only data transfer
process that can occur while the drive is in RUN mode.

The VCD 723 can not be in RUN mode while an upload or a program download
is occurring. Furthermore, the PAC program stops executing while the upload or
program download is happening.

Function number 992 is used to upload and download PAC programs and
parameters. The following steps explain how to perform an upload or download:

❏ Press the Up or Down Arrow keys to select the desired function number,

992. The display shows a description of the function on the top line, and the
action that may be performed on the bottom line.

UPLOAD/DOWNLOAD
(press ENT) T992

❏ Press the ENT key. A message will appear that will state the actions that may

be performed.

DRIVE —> PC
UP, DOWN, or ENT

❏ At this point, the ESC key, the Up Arrow key, or the Down Arrow key may be

pressed.