Owner manual

3-14
ABC 040104
3.5.3 ABC VISA INSTRUMENT DRIVER
The VISA instrument driver simplifies programming with a VISA compatible GPIB controller. and
Includes 1) source code (C) for all VISA functions, 2) a complete programming reference man-
ual and 3) a sample application of the VISA functions (written in C) which can be used to pro-
gram one or more ABC power supplies using a virtual front panel observed on a computer
monitor.
Download the latest VISA driver from the Kepco website at
http://www.kepcopower.com/drivers.htm
Although the software drivers supplied by Kepco are VISA compliant, they also require the
installation of the proper VISA driver from your GPIB card supplier. Many vendors supply this
software with the hardware; National Instruments (http://www.natinst.com) has the driver for
their cards available on the internet at a file transfer site (ftp://ftp.natinst.com — find the folder
for support and VISA drivers).
3.6 RS232-C OPERATION
The ABC may be operated via an RS232-C terminal, or from a PC using a terminal emulation
program. The default settings are as follows:
• Baud rate: 9600
• Parity: None
•Data Bits8
• Stop Bits 1
•Echo ON
• XON OFF
Baud rate may be changed from the front panel (see PAR. 3.6.1); changing other RS 232
parameters is accomplished using SCPI commands (see Appendix B). To change baud rate
refer to PAR’s. B.80 and B.81. To select prompt refer to PAR’s. B.86 and B.87. To select echo
refer to PAR’s. B.82 and B.83. To select XON/XOFF, refer to PAR’s. B.84 and B.85.
TABLE 3-6. IEEE 488 (GPIB) BUS DATA MODE MESSAGES
MNEMONIC MESSAGE DESCRIPTION COMMENTS
DAB
Data Byte Received or Sent
END
End Received or Sent
EOS
End of String Received or Sent
RQS
Request Service Sent
STB
Status Byte Sent