KEPCO KLP 10-150-1.2K, Руководство пользователя

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KLP031308
3-3
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, RS232, or LAN ports. In digital
remote mode the power supply normally shows
dRem
in the status display. The LAN indicator
[-1.2K 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. The OPERATE INSTRUMENT web page [-1.2K Models only] must not be active when
restoring local mode. To disable local mode entirely, see PAR. 3.2.2.1 for front panel lockout.
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, except that the
DC OUTPUT ON/OFF switch is operational. 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.
3.2.2.1 REMOTE WITH LOCAL (FRONT PANEL) LOCKOUT
To prevent unauthorized setting of the power supply to Local mode, a local lockout mode can be
enabled which prevents the power supply from being restored to local mode via the front panel.
With the power supply turned off, set the ANALOG I/O DIP switch, position 5 (see Table 2-2) to
ON. Now when the power supply is turned on the status display will read one of the following:
LOCK
- front panel controls locked, analog mode not enabled and no digital commands received.
aRwl
(analog Remote with local lockout) - front panel controls locked, analog mode enabled
dRwl
(digital Remote with local lockout) - front panel controls locked, analog mode disabled and
a digital command received.
Once the front panel is locked, it can only be unlocked by either of the following:
• turn the power supply off, set ANALOG I/O DIP switch position 5 to OFF, and then
power up again.
• send the following SCPI command via GPIB, RS232 or LAN port:
SYST:KLOC OFF