Information

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1. THE DIGITAL (IEEE 488.2 SCPI) PROGRAMMING OPTION

1.1 INTRODUCTION

The internal factory installed GPIB interface allows to operate the Genesys

Power Supply

from a computer via IEEE-488 communication bus.

The GPIB interface allows the user complete remote control of the power supply, including

output voltage and current limit programming, setting the Over Voltage Protection, Under

Voltage Limit and Foldback protection. The Output Voltage and Output Current can be

measured and the power supply status can be monitored.

Commands that are standard with digital programming include:

% Program Voltage % Program Current

% Measure Voltage % Measure Current

% Over-Voltage Shutdown % Current Fold Back Shutdown

% IEEE-488.2 Compliant % SCPI Compliant

1.2 SCOPE OF MANUAL

This manual contains the information needed to operate the optional embedded digital

interface used in the Power Supply. The interface is contained on one circuit card. It is op-

tionally installed by the factory at the time of manufacture.

1.3 CONFIGURATION

To operate on the IEEE 488.2 bus, each supply will require that an IEEE Programming

Interface be installed.

1.4 GLOSSARY

1. The HOST PC will be the computer in control of the GEN supply(s) when operating under com-

puter (Remote) control.

2. Point-to-Point Mode will mean that 1 IEEE Interface can control only 1 GEN supply.

3. Multi Drop Mode will mean that 1 IEEE Interface can control more than 1 GEN supply.

4. When in Multi Drop Mode the GEN supply with the IEEE Interface installed will be referred to

as the Master Supply and all other attached supplies will be referred to as Slave Supplies.

5. A Communication Collision (AKA collision) is an event when in Multi Drop Mode more than 1

GEN supply attempts to transmit data simultaneously.

6. The Main micro. is the microprocessor installed on the GENESYS power supply control board

that monitors/controls all power supply activity.

7. The IEEE micro. is the microprocessor installed on the IEEE Interface that is installed within

the power supply.

8. Local Mode means that the supply under control of the “Front Panel Knob” or “Rear Panel

Analog Remote” inputs.

9. Remote Mode means that the supply operating under direction of HOST PC/IEEE Interface via

the IEEE488.2 Bus. Front panel does not operate except to view settings.

10. Serial Interface means that the Master supply is interfaced to the IEEE Interface via RS-232

digital communications and Slave supplies are interfaced to the IEEE Interface via RS485

daisy chain from the Master supply. This is done to activate Remote Control or to monitor sup-

ply activity while in Local Mode.

11. Instrument Summary Bit is a bit in an Instrument Summary Register (Ref. Figure 6 and