KEPCO BOP-GL 1KW Operator Manual Firmware Ver.3.05 and higher - Manual (Page 136)

B-8
BOP-1KW-GL 022814
B.20 [SOURce:]CURRent[:LEVel][:IMMediate][:AMPlitude] QUERY
CURR?
Syntax: Short Form: [SOUR:]CURR[:LEV][:IMM][:AMP]? MIN, MAX
Long Form: [SOURce:]CURRent[:LEVel][:IMMediate][:AMPlitude]? MIN, MAX
Return Value: = digits with decimal point and Exponent, e.g., 2.71E1 for 27.1
Description: Returns either the programmed value, maximum value, or minimum value of current. The
CURR? query returns the programmed value of current. Actual output current will depend on load con-
ditions. The CURR?MAX query returns the maximum positive current allowed for a particular model.
CURR? MIN returns minimum negative current allowed for power supply (always negative). Related
Commands: CURR. (See example, Figure B-1.)
B.21 [SOURce:]CURRent[:LEVel]:LIMit[:BOTH] COMMAND
CURR:LIM[:BOTH]
Syntax: Short Form: [SOUR:]CURR[:LEV]:LIM[:BOTH]
Long Form: [SOURce:]CURRent[:LEVel]:LIMit[:BOTH]
where is between zero and I
NOM
Description: Establishes the software limit for output current, i.e., sets the maximum value of output cur-
rent that the unit will be allowed to source and sink. Requires MEM:UPD (PAR. B.12) to save for
power up. See PAR. 3.5.5.2 and Figure 3-6 for special programming considerations. (See Figure B-4)
FIGURE B-4. SETTING LIMITS
NOTES: 1. This example assumes a BOP 36-28GL power supply is operating in constant current (CC) mode.
2 Examples below are intended only to illustrate command functions. Refer to PAR. for program-
ming techniques to optimize performance.
CURR:LIM? Returns 28,28 (positive and negative defaults for max
current in current mode).
CURR:LIMIT:POS 10;NEG 2 Establishes the maximum positive and negative current values
that can be set in current mode.
FUNC:MODE VOLT SETS POWER SUPPLY IN VOLTAGE MODE.
VOLT 15;CURR 2 Allows the power supply to provide 15 volts positive with the
ability to source or sink up to 2 amperes. The display shows:
15.000 2.000 2.000.
CURR 10 Since the BOP is operating in voltage mode, sets the current
capability (current protect) to 10 amperes.The display shows:
15.000 10.000 10.000
CURR:PROT? Returns 10,10
CURR:PROT:NEG 1 Limits the negative current capability to 1 ampere.
CURR:PROT:LIM:NEG 5 Prevents CURR:PROT:NEG setting from exceeding
5 amperes
CURR:PROT? Returns 10,1 (the actual positive (10) and negative (1)
protection levels for the current.
---- Turn BOP power off and then on.
CURR:LIM?
Returns 28,28 the factory default levels (all the above
changes have been lost). To save the changed limits for power-
up, the user must send MEM:UPD LIM.
CURR:PROT:LIM:POS 28.3;NEG 28 Establishes new max current protect limits (positive 28.3 and
negative 28.
CURR 28 Establishes the positive protect to be 28 amperes and the
negative protection remains 28 amperes.
CURR:PROT? returns 28,28
FUNC:MODE CURR Changes the mode of operation of the power supply to current
mode.