KEPCO KLP Series (older -1200 models) Operator Manual - Manual (Page 53)

KLP073008
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• The DC VOLTS display shows the month and day of the active calibration date.
• The DC AMPS display shows the year of the active calibration date.
Tap the DC OUTPUT switch to proceed to the system calibration (see PAR 4.3).
3.3 DIGITAL REMOTE MODE PROGRAMMING USING SCPI COMMANDS
KLP Power Supplies may be programmed over a control bus using SCPI (Standard Commands
for Programmable Instruments). SCPI provides a common language conforming to IEEE 488.2
for instruments used in an automatic test system. The control bus used must be either the IEEE
488 standard communication bus (General Purpose Interface Bus, GPIB) (see PAR. 3.5) or the
RS232C bus (see PAR. 3.4). Refer to Table 2-3 for GPIB port and Table 2-4 for RS232
input/output signal allocations. All power supply functions available from the front panel can be
programmed via remote commands, as well as some that are not available from the front panel
(see PAR. 3.3.1).
This section includes a discussion of functions available only using digital remote programming
(PAR. 3.3.1), GPIB bus protocols (PAR. 3.5), instructions for changing the GPIB address (PAR.
3.5.1), a discussion of the VISA (Virtual Instrumentation Software Architecture) driver supplied
with the unit (PAR. 3.5.2), followed by an introduction to SCPI programming (PAR. 3.6).
3.3.1 ADDITIONAL FUNCTIONS AVAILABLE VIA DIGITAL REMOTE PROGRAMMING
Digital Remote Programming is accomplished through SCPI programming (PAR. 3.6). The fol-
lowing paragraphs summarize the functions available using the SCPI subsystems described in
PAR. 3.6.3. For complete details regarding digital commands and queries, refer to Appendix A
(IEEE 488.2 Commands/Queries) and Appendix B (SCPI Commands/Queries).
3.3.1.1 STORAGE OF USER-PROGRAMMED ACTIVE SETTINGS
The KLP Power Supply contains 40 memory locations that can be used to store active settings.
Values are stored in the nonvolatile memory using the *SAV command (see Appendix A, PAR.
A.11), and are retained when the unit is turned off. The active settings can then be restored by
issuing the *RCL command (see Appendix A, PAR. A.9). These setting are cleared when a cali-
bration is performed.
If a virtual model setting (maximum voltage or current, see PAR. 3.2.5) is changed, and a stored
setting is outside the range established by the new virtual model, the following occurs: when the
setting is recalled, the stored value is reset to the default minimum (zero V or minimum A) and
an error message notes that the requested value is out of range.
3.3.1.2 USER-DETERMINED OUTPUT SEQUENCES
Using the LIST commands (see Appendix B), up to 100 locations are available for programming
the KLP output. These locations enable the user to program the output using multiple command
sequences which may be initiated by a single command. The repeatable user-determined
sequences are stored in volatile memory and are retained until reprogrammed, the power sup-
ply is turned off, a calibration is performed, or a LIST:CLEar command is received. If a virtual
model setting (maximum voltage or current, see PAR. 3.2.5) is changed, and a programmed
value is outside the range established by the new virtual model, the following occurs: when the
program is executed, the programmed value is reset to the default minimum (zero V or minimum
A) and an error message notes that the requested value is out of range.