31
[default]), and the power supply address is 12 as is the case for all models. Then the communication path for this
combination is 512.
COMMON COMMANDS: There is a wide variety of commands available to program the power supply. However,
the commands which pertain to voltage and current are of most use. These commands are: VSET, ISET, OVSET,
VOUT?, IOUT?, OVSET? and OCP.
Secondary commands of prime importance pertain to the actual programming language. Some of these commands
are: OUTPUT, ENTER, DELAY, SEND, PRINT, and CLEAR. The definitions and uses of these commands are as
follows:
OUTPUT: Addresses the power supply to listen and sends command to power supply.
ENTER: Addresses the power supply to talk and receive data from the power supply.
DELAY: Introduces a time delay to the power supply.
note: This command is extremely important since the power supplies occasionally require time delays
in order to execute operations. Otherwise, error messages occur.
CLEAR: Clears the power supply.
note: The PPS series does not have a CLR command. Therefore, the user must initially specify a
hardware clear before beginning programming.
SEND: Sends GPIB management commands.
PRINT: Prints the specified data to screen or printer.
RUN: Executes the program.
All commands may be accepted in either upper or lower case letters in ASCII code. The PPS Series accepts integer
or numeric data as input. Plus (+) and minus (-) signs are also numeric characters. Remember not to program too
large a value since the power supply rounds off data to suit the power supplies resolution.
SENDING DATA: The steps involved in sending data to the power supply are setting the address (power supply &
computer), function and sending the command (basic). For example, to turn on the output of a power supply
(single output), send:
OUTPUT 512; OUT 1
where:
OUTPUT - Basic Statement
512 - DMA channel (5) and GPIB device address (12)
OUT - GPIB command
1 - enable output (0 disable output)
Continuing on with this example we will set the output voltage to 11V and output current to 1.7 amps, therefore
send:
OUTPUT 512; VSET 11
OUTPUT 512; ISET 1.7
NOTE: The voltage and current values are given in volts and amps.
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