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Remote Operation 65
5
Remote Operation
Introduction
Chapter 4 - Local Operation described how to program the Multiple Electronic Load manually using the front panel keys.
This chapter describes the fundamentals of programming the Multiple Electronic Load remotely from a GPIB controller The
similarities between local and remote programming will become apparent as you read this chapter. The intent of this
chapter is to help first time users quickly become familiar with operating their Electronic Load remotely from a GPIB
controller. Only the most commonly used HPSL commands will be discussed. Programming examples given in this chapter
use the HPSL commands in their simplest form (abbreviated commands, no optional key words, etc.).
Refer to the Electronic Load Family Programming Reference Guide for a detailed description of all commands. The
Programming Guide includes a complete Language Dictionary as well as a quick reference summary of all of the HPSL
commands that can be used to program the Electronic Load. It also covers the Electronic Load’s GPIB functions, status
reporting capabilities, and error messages.
Note The programming examples that follow are written in BASIC Programming Language for use with HP
Series 300 computers. You may convert examples for use with any other language or computer.
Enter/Output Statements
You need to know the statements your computer uses to output and enter information. For example, the Agilent BASIC
language statement that addresses the Multiple Electronic Load to listen and sends information to the Multiple Electronic
Load is:
OUTPUT
The Agilent BASIC language statement that addresses the Multiple Electronic Load to talk and reads information back from
the Multiple Electronic Load is:
ENTER
The Multiple Electronic Load’s front panel Rmt annunciator is on when it is being controlled remotely via a GPIB
controller and its Addr annunciator is also on when it is addressed to talk or to listen.
GPIB Address
Before you can program your Multiple Electronic Load remotely via a GPIB computer, you need to know its GPIB address.
Each instrument you connect to the GPIB interface has a unique address assigned to it. The address. allows the system
controller to communicate with individual instruments.
The Multiple Electronic Load’s GPIB address is set locally at the front panel using the Address key as described in Chapter
4. The examples in this chapter assume that the Electronic Load’s address is 05.
Series 300 computers have a GPIB interface select code which is 7. Only one instrument connected to the interface
can have address 05. Thus, the complete GPIB address assumed in the upcoming programming examples is 705. You may
modify the examples to have any GPIB address.