KEPCO KLP Series User Manual, Rev 4 - Manual (Page 45)

KLP091313
3-3
NOTE: A minimum programmed current is required to ensure proper operation of the power
supply under all load conditions. Programmed current is automatically set to be at least
the minimum current (actual value depends on model, see Table 1-2).
• Since the output is off, Constant Voltage (CV) mode indicator (green LED) and Con-
stant Current (CC) indicator (amber LED) are off.
3.2.2 SETTING LOCAL/REMOTE MODE
LOCAL MODE. When the power supply is turned on, it is automatically set to Local mode as
long as Analog I/O port pin 12 is not grounded. In local mode the Status display is normally
blank.
DIGITAL REMOTE MODE. The power supply will automatically go into digital remote mode
when digital remote commands are accepted via the GPIB, RS 232, or LAN ports. In digital
remote mode the power supply normally shows dRem in the status display. The LAN indicator
[E-Series models only] is on when a valid IP address has been found. When in digital remote
mode, all front panel controls are disabled. If desired, local mode can be restored by pressing
both VOLTAGE and CURRENT controls simultaneously; the power supply will then remain in
local mode until another digital command is received, causing the unit to return to remote digital
mode. To disable local mode entirely, see PAR. 3.2.2.1 for front panel lockout.
For E-Series models the OPERATE INSTRUMENT web page must not be active when restoring
local mode. Changes to the unit configuration made while in local made will not appear on the
OPERATE INSTRUMENT web page until remote digital control is restored: either refresh the
open browser page or close the browser and start a new session (dREM reappears in the status
display).
NOTE: During both LOCAL and DIGITAL REMOTE operation, the analog readback signals
(voltage and current) remain available, as does the remote inhibit signal; only program-
ming signals are disregarded.
ANALOG REMOTE: With power supply turned off, ground Analog I/O port pin 12. Refer to PAR.
2.7.9 to configure the Analog I/O Port; refer to Table 2-2 to configure the Analog I/O switch.
When the power supply is turned on, the status display shows aRem (Analog Remote program-
ming selected). The unit will accept Analog Remote commands (see PAR. 3.4) and front panel
controls are disabled. Local mode can be restored by pressing the VOLTAGE and CURRENT
controls at the same time. Once local mode has been restored, analog remote programming is
disabled until the unit is powered off, then on again.
NOTE While Analog Remote programming is active, the unit will respond to digital queries,
but will not respond to most digital commands, except for the front panel unlock com-
mand (see PAR. 3.2.2.1). Note that digital commands that conflict with the analog pro-
gramming settings must not be issued, as these can cause momentary unpredictability
at the output until analog control is reasserted. If unit calibration is initiated via one of
the digital ports the unit will immediately exit analog remote control and enter digital
remote control. Resumption of remote analog control requires that source power to the
unit be cycled.