BOP HIPWR 031912 3-5When in Sink mode, the power supply is operating as an electronic load, absorbing and recu-perating the energy of an active load. Recuperated energy is passed back into the a-c sourcepower line. Mode displayed at the upper right is VOLTAGE SINK when the unit is in voltagemode and an external constant current is injected into the BOP. Correspondingly, CURRENTSINK is displayed when the unit is in current mode and an injected current from an external con-stant voltage is presented at the output of the BOP. These messages are normally displayedbriefly when voltage is decreased towards zero, and may also be displayed briefly duringchanges in a capacitive load.The bottom lines of the display provide STATUS, ACTIVE SETTINGS and MESSAGES (includ-ing error messages).STATUS includes whether the unit is under local or remote control, and identifies the main andprotect channels.The protect channel will show either a single entry for both positive and nega-tive VPROTECT or CPROTECT or separate entries for + and – VPROTECT or CPROTECT.This is established by selecting either Bipolar or Independent for Protect Entry (see PAR,3.3.3.1).ACTIVE SETTINGS show the values that will be applied to the respective channel. The high-lighted settings are used to program the unit and can be changed using the keypad or ADJUSTcontrol after highlighting. If these are changed using the keypad, the ENTER key must bepressed to program the unit; if the ADJUST control is used, the changed setting immediatelyprograms the unit without pressing ENTER. If the main channel indicates CURR-EXT or VOLT-EXT, the setting establishes the full scale output corresponding to a 10V analog signal (seePAR, 3.4.3.2). If the main or protect channel indicates EXTERNAL, the corresponding setting isdetermined by an analog reference (see PAR. 3.4.3.1.MESSAGES change depending on the particular screen being displayed. Error messages aredisplayed for both local and remote operation, and only appear briefly.At the right of the display, five graphic boxes indicates the active function of the soft functionkeys, ! through %. Depressing the corresponding key on the keypad activates the functionshown on the display. These functions are arranged in a menu format (see PAR. 3.2.4).3.2.3 TURNING THE POWER SUPPLY ONCAUTION: DO NOT REPEATEDLY TOGGLE THE CIRCUIT BREAKER/SWITCH AS THISMAY DAMAGE THE UNIT.Set POWER ON/OFF circuit breaker/switch (1, Figure 3-1) on front panel to ON. If actuator doesnot lock when released, wait a few seconds before trying again. The circuit breaker is “trip-free”design; if overload exists, contacts cannot be held closed by actuator.When the power supply is turned on, it performs a brief self-test that includes testing the threeprocessors (analog, interface and display), then displays the power-up screen (see Figure 3-3or 3-4). If an error is detected, the FAULT indicator will light, information about the error will bebriefly displayed on the LCD.If the unit powers up in REMOTE mode, press ! (see PAR. 3.3.1) to set the unit to LOCALmode.NOTE: If the unit is a Slave of a multiple unit configuration, the unit will power up in REMOTEand will display LOCAL LOCKOUT once the Master has taken control of the Slave. Torestore LOCAL control of a Slave, power down both master and slave, then turn ononly the slave and press ! (see PAR. 3.3.1) to set the unit to LOCAL mode.
