You can remotely save and recall operating states. See *SAV and *RCL in "Chapter 7 - Language Dictionary" for the parameters that are saved and recalled.
Note | When you turn the power supply on, it automatically retrieves the state stored in location 0. When a power |
| supply is delivered, this location contains the factory defaults (see *RST in Chapter 7). |
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|
OUTP OFF;VOLT:LEV 65;PROT 68 CURR:LEV 33;PROT:STAT ON *SAV 2
*RCL 2
Program a desired operating state.
Save this state to location 2. (Later) recall this same state.
Writing to the Display
You can include messages to the front panel LCD in your programs. The description of DISP:TEXT in "Chapter 7 - Language Dictionary" shows the number and types of permitted display characters. In order to write to the display, you must first change it to text mode as shown in the following example:
DIS:MODE TEXT | Switch display to text mode. |
RECALLED 2 | Write “Recalled 2” to the display. |
DIS:MODE NORM | Return dispaly to its normal mode. |
Programming Status
You can use status programming to make your program react to events within the power supply. Chapter 8 explains the functions and bit configurations of all status registers. Refer to Figure
Detecting Events via SRO
Usually you will want the power supply to generate interrupts (assert SRQ) upon particular events. For this you must selectively enable the appropriate status register bits. The following examples allow the power supply to assert SRQ under selected conditions.
1.STAT:OPER:ENAB 1280;PTR 1280;*SRE 128 Assert SRQ when the unit switches between CV and CC modes.
2.STAT:OPER:ENAB 1;PTR 1;NTR 1;*SRE 128 Assert SRQ when the unit enters or leaves calibration mode.
3. | STAT:QUES 3;PTR | 3;*SRE 128 | Assert SRQ when the unit goes into overvoltage or overcurrent condition. |
4. | STAT:OPER:ENAB | 1280;PTR 1280; | Assert SRQ under any event occurring in 1. or 3., above. |
| STAT:QUES 3;PTR | 3;*SRE 136 |
|
Reading Specific Registers
You can exercise program control without interrupts by reading specific registers.
STAT:OPER:1280;EVEN? | Enable only the CV and CC events and read their status. |
STAT:OPER:ENAB 1313;PTR 1313;EVEN? | Enable all conditions of the Operation Status register and read any |
| events. |
STAT:OPER:ENAB?;EVENT?;:STAT:QUES:ENAB?;EVEN?;:*ESE?;*ESR?
Read which events are active and which events are enabled in the
Operation, Questionable, and Standard Event status registers.
54 Remote Programming
