B-28 BOP-1K 111315FIGURE B-9. USING PROT:LIM:POS AND PROT:LIM:POS COMMANDS TO SET ASYMMETRICAL LIMITSB.99 [SOURce:]VOLTage[:LEVel]:PROTect:MODE COMMAND VOLT:PROT:MODESyntax: Short Form: [SOUR:]VOLT[:LEV]:PROT:MODE (EXT | FIX | LESS |)Long Form: [SOURce:]VOLTage[:LEVel]:PROTect:MODE (EXTernal | FIXed | LESSer |)Description:Determines how voltage protection limits are controlled in voltage or current mode of oper-ation.FIXED - Allows the limits to be controlled by digital signals from either the keypad (if the unit is in localmode) or SCPI command (if the unit is in remote mode).EXTERNAL: Allows both current and voltage limits to be controlled by analog signals applied to theanalog port; limits set from the keypad or SCPI command have no effect (see PAR. 3.4.4).LESSER LIMIT: Allows protect limit to be automatically selected from either 1) the external analogvoltage applied to the Analog I/O port or 2) the value set from the keypad or SCPI command). Which-ever limit has a lower absolute value (closest to zero) has effectB.100 [SOURce:]VOLTage[:LEVel]:PROTect:MODE? QUERY VOLT:PROT:MODE?Syntax: Short Form: [SOUR:]VOLT[:LEV]:PROT:MODE?Long Form: [SOURce:]VOLTage[:LEVel]:PROTect:MODE?Returns FIX, EXT or LESSDescription: Identifies how voltage protection limits are controlled: FIX for Fixed, EXT for external, LESS for thelesser of the internal (fixed) and external protection limit values (See PAR. B.99 for details).B.101 [SOURce:]VOLTage[:LEVel]:PROTect:NEGative COMMAND VOLT:PROT:NEGSyntax: Short Form: [SOUR:]VOLT[:LEV]:PROT:NEG Long Form: [SOURce:]VOLTage[:LEVel]:PROTect:NEGative where is between minimum (box) value (Figure 1-3) and 1% above rated (nominal) outputvoltage.Description: Establishes the negative protection limit for voltage; maximum is 1% greater than rated output voltage.B.102 [SOURce:]VOLTage[:LEVel]:PROTect:NEGative? QUERY VOLT:PROT:NEG?Syntax: Short Form: [SOUR:]VOLT[:LEV]:PROT:NEG?Long Form: [SOURce:]VOLTage[:LEVel]:PROTect:NEGative?Returns: Description: Identifies the negative protection limit for voltage.B.103 [SOURce:]VOLTage[:LEVel]:PROTect:POSitive COMMAND VOLT:PROT:POSSyntax: Short Form: [SOUR:]VOLT[:LEV]:PROT:POS Long Form: [SOURce:]VOLTage[:LEVel]:PROTect:POSitive where is between minimum (box) value (Figure 1-3) and 1% above rated (nominal) outputvoltage.Description: Establishes the positive protection limit for voltage; maximum is 1% greater than rated output voltage.NOTE: The power supply is assumed to be operating in constant voltage mode.VOLT:PROTECT:LIMIT:POS 5 Sets positive voltage protection limit to +5V.VOLT:PROTECT:LIMIT:NEG 15 Sets negative voltage protection limit to -15V.VOLT:PROTECT 10 Attempts to set voltage protection levels to ±10V. No error generated.VOLT:PROT:POS? Returns 5 (positive voltage protection set to +5V since 5 is less than10.VOLT:PROT:NEG? Returns 10 (negative voltage protection set to -10V.VOLT:PROTECT 18 Sets both voltage protection limits to +18V. No error generated.VOLT:PROT:POS? Returns 5 (positive voltage protection set to +5V since 5 is less than18.VOLT:PROT:NEG? Returns 15 (negative voltage protection set to -15V, since 15 is lessthan 18
