KEPCO KLN Series (750W, 1500W, 3000W), Main Contro Firmware Version 1.70 and higher - Manual (Page 86)

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KLN Series 051614
3.7.1 SCPI MESSAGES
There are two kinds of SCPI messages: program messages from controller to power supply,
and response messages from the power supply to the controller. Program messages consist of
one or more properly formatted commands/queries and instruct the power supply to perform an
action; the controller may send a program message at any time. Response messages consist of
formatted data; the data can contain information regarding operating parameters, power supply
state, status, or error conditions.
3.7.2 COMMON COMMANDS/QUERIES
Common commands and queries are defined by the IEEE 488.2 standard to perform overall
power supply functions (such as identification, status, or synchronization) unrelated to specific
power supply operation (such as setting voltage/current). Common commands and queries are
preceded by an asterisk (*) and are defined and explained in Appendix A.
3.7.3 SCPI SUBSYSTEM COMMAND/QUERY STRUCTURE
Subsystem commands/queries are related to specific power supply functions (such as setting
output voltage, current, etc.) Figure 3-17 is a tree diagram illustrating the structure of SCPI sub-
system commands used in the KLN Power Supply with the root at the left side, and specific
commands forming the branches. The following paragraphs introduce the subsystems; subsys-
tem commands are defined and explained in Appendix B.
3.7.3.1 CALIBRATE SUBSYSTEM
This subsystem is used to calibrate the unit, however these commands and queries are not
accessible to the user.
3.7.3.2 DISPLAY SUBSYSTEM
This subsystem is used to set and ascertain the brightness on the front panel Voltage and Cur-
rent displays.
3.7.3.3 FETCH SUBSYSTEM
This subsystem is used to measure and return both voltage and current measurements.
3.7.3.4 OUTPUT SUBSYSTEM
This subsystem is used to control whether the output is on or off, and whether the power supply
powers up with the output set to the reset state or to the last settings in effect when the unit was
powered off.
3.7.3.5 SOURCE SUBSYSTEM
This subsystem is used to program the output voltage and current of the power supply, associ-
ated protection levels and limits and output ramp up and down times. This subsystem is also
used to control the memory locations used to store power supply settings for later recall.
3.7.3.6 SYSTEM SUBSYSTEM
This subsystem is used to control the audible beep upon key presses, enabling/disabling the
front panel keys and reading of error codes and SCPI version.