GE IC697VAL348 user manual Theory of Operation

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Chapter

4

Theory of Operation

This chapter discusses the operation of the Digital-to-Analog Converter Board, and is divided into the following sections:

Operational Overview

Immediate DAC Update Mode

Delayed DAC Update Mode

VMEbus Interface Description

GFK-2059

4-1

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Contents GE Fanuc Automation As Used in this Publication CimstarContents Introduction, Description, and Specifications Reference Material and Other GE Fanuc ManualsGeneral Description Functional Description Safety Summary Ground the SystemConfiguration and Installation Physical Installation Do not install or remove boards while power is appliedConfiguration Jumper Function Preset ConditionBefore Applying Power Checklist Digital-to-Analog Converter Board InstallationBoard Address Selection Switches Read this Direction OFF, Open = ON, Closed =Address Modifier Address Modifier Response Selection Digital Code Selection JA Offset Binary TWO’S Complement CodeProgram Controlled and External Start Convert Mode Connector Descriptions Rear View of Board PC Board P2 Connector Pin Number Row a Signal MnemonicRow B Signal Mnemonic Row C Signal MnemonicPC Board P3 Connector Row B Signal Mnemonic Row CP3 Connector DAC Zero Offset and Gain CalibrationDigital-to-Analog Converter Board Calibration Table Channel Offest PotSide Programming 1Control and Status Register DAC Channels Address MapDAC Channels 0 to 7 Address Write Only D15 MSB D00 LSBImmediate DAC Update Mode Digital-to-Analog Converter Board Programming OptionsControl Register Data Format and Definitions D09 D08 Delayed DAC Update Mode Test Mode Programming Program Example Delayed DAC Update Mode END Analog Output Control in Immediate DAC Update Mode Analog Out Pathway Control Word D15 to D0 Hex Value DAC Programming Sequence Delayed DAC Update Mode Analog Output Control in Delayed DAC Update Mode Theory of Operation Operational Overview Immediate DAC Update Mode Program Control Update Mode Digital-to-Analog Converter Board Functional Block Diagram VMEbus Interface Description A01 A02 A03 A04 VMEbus Interface Logic and Interface Signals DIG GND Maintenance