Introduction, Features, Encoder Interface | Advantech PCI-1784

1. Introduction

Thank you for buying the Advantech PCI-1784. The PCI-1784 is a 4- axis quadrature encoder and counter card for PCI bus. This card includes four 32-bit quadruple AB phase encoder counters, 8-bit timer with multi range time-base selector and four isolated digital input and four isolated digital output. Its flexible interrupt sources are suitable for motor control and position monitoring.

The following sections of this chapter will provide further information about features of the multifunction cards, a Quick Start for installation, together with some brief information on software and accessories for the PCI-1784 card.

1.1Features

❏Four 32-bit up/down counters

❏Single ended or differential inputs

❏Pulse/direction and up/down counter

❏x1, x2, x4 counts for each encoder cycle

❏Optically isolated up to 2500 VDC

❏4-stage digital filter with selectable sampling rate

❏On board 8-bit timer with wide range time-base selector

❏Multiple interrupt sources for precision application

❏Four isolated digital input

❏Four isolated digital output with flexible function

❏Board ID

The Advantech PCI-1784 offers the following main features:

Encoder Interface

Each channel includes a decoding circuit for incremental quadrature encoding. Inputs accept either single-ended or differential signals. Quadrature input works with or without an index, allowing linear or rotary encoder feedback.

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Advantech PCI-1784 specifications Introduction, Features, Encoder Interface

Contents

Page Page Contents Appendix D. Operation Encoder Interface FeaturesIntroduction Digital Input and Interrupts CountersFlexible Digital Output function Special Shielded Cable for Noise Reduction Board ID Applications Installation Guide Installation Flow Chart Register-level Programming Software OverviewDevice Drivers Programming Tools Device Drivers Programming Roadmap Programming with Device Drivers Function Library Troubleshooting Device Drivers Error Wiring Boards AccessoriesWiring Cable Unpacking InstallationPage Setup Screen of Advantech Automation Software Driver Installation Select the Individual Drivers option Hardware InstallationPage Device name listed on the Device Manager Board selection Device Setup & Configuration ‘Setup’ dialog box Setting Up and configure the device Operation dialog box Switch and Jumper Settings Signal ConnectionsOverview Names of Jumpers Function description Board ID setting SW1 Pin Assignment Signal ConnectionsConnector Signal Description Single ended Outputs Encoder Quadrature encoder input Quadrature encoder up/down counter input connections Isolated digital output Isolated digital input Encoder Output Appendix A. SpecificationsTimer General InterruptCounter Latch ADDRESS, Control and Data BUS Appendix B. Block DiagramPage I/O Port Address Map Appendix C. Register Structure and Format + HEX Table C-1 PCI-1784 register format Part 1CH Clock Control Table C-2 PCI-1784 Register for counter 0/1/2/3 mode Counter 0/1/2/3 mode BASE+00/04/08/0CH DI0 Table C-3 PCI-1784 Register for counter 0/1/2/3 latch data Counter 0/1/2/3 latch data BASE+00/04/08/0CH Table C-4 PCI-1784 Register for counter 0/1/2/3 compare data Counter 0/1/2/3 compare data BASE+10/14/18/1CH Table C-5 PCI-1784 Register for interrupt control Interrupt control register BASE+20H Table C-6 PCI-1784 Register for interrupt status Interrupt status register BASE+20H Table C-7 PCI-1784 Register for clock control Clear Interrupt BASE+24H Table C-8 PCI-1784 Register for clear interrupt Table C-9 PCI-1784 Register for software latch Software latch BASE+28H Table C-10 PCI-1784 Board ID data Board ID BASE+28H Table C-11 PCI-1784 Register for reset counter Reset counter BASE+2CH Table C-12 PCI-1784 Register for digital output Digital output BASE+30H Table C-13 PCI-1784 Register for digital input/output Digital input/output BASE+30HPage Quadrature encoder introduction Appendix D. Operation Quadrature input counter mode Mode Maximum input rate 8MHz 4MHz 2MHz 1MHzCounter modes Single-ended vs. differential input Pulse/direction mode Pulse modeDisabled mode Digital noise filter Clock frequency Maximum width Latch modeLatch Index latch Timer function Counter reset value Interrupt function