Allen-Bradley 1747-OCE User manual

1747-OC Series

Open Controllers

1747-OCE, -OCF

User Manual

Allen-Bradley HMIs

Important User Information

Because of the variety of uses for the products described in this

publication, those responsible for the application and use of this control

equipment must satisfy themselves that all necessary steps have been

taken to assure that each application and use meets all performance and

safety requirements, including any applicable laws, regulations, codes and

standards.

The illustrations, charts, sample programs and layout examples shown in

this guide are intended solely for purposes of example. Since there are

many variables and requirements associated with any particular

installation, Allen-Bradley does not assume responsibility or liability (to

include intellectual property liability) for actual use based upon the

examples shown in this publication.

Allen-Bradley publication SGI-1.1, Safety Guidelines for the Application,

Installation and Maintenance of Solid-State Control (available from your

local Allen-Bradley office), describes some important differences between

solid-state equipment and electromechanical devices that should be taken

into consideration when applying products such as those described in this

publication.

Reproduction of the contents of this copyrighted publication, in whole

or part, without written permission of Rockwell Automation, is

prohibited.

Throughout this manual we use notes to make you aware of safety

considerations:

Attention statements help you to:

•

identify a hazard

•

avoid a hazard

•

recognize the consequences

ATTENTION: Identifies information about practices or

circumstances that can lead to personal injury or death,

property damage or economic loss

Important: Identifies information that is critical for successful

application and understanding of the product.

!

European Communities (EC)

Directive Compliance

If this product has the CE mark it is approved for installation within the

European Union and EEA regions. It has been designed and tested to

meet the following directives.

EMC Directive

This product is tested to meet the Council Directive 89/336/EC

Electromagnetic Compatibility (EMC) by applying the following

standards, in whole or in part, documented in a technical construction

file:

•

EN 50081-2 EMC — Generic Emission Standard, Part 2 —

Industrial Environment

•

EN 50082-2 EMC — Generic Immunity Standard, Part 2 —

Industrial Environment

This product is intended for use in an industrial environment.

Low Voltage Directive

This product is tested to meet Council Directive 73/23/EEC Low

Voltage, by applying the safety requirements of EN 61131-2

Programmable Controllers, Part 2 - Equipment Requirements and Tests.

For specific information required by EN 61131-2, see the appropriate

sections in this publication, as well as the Allen-Bradley publication

Industrial Automation Wiring and Grounding Guidelines For Noise

Immunity, publication 1770-4.1.

This equipment is classified as open equipment and must be mounted in

an enclosure during operation to provide safety protection.

Allen-Bradley HMIs

1747-UM001A-US-P - March 2000

Summary of Changes

This manual has been updated throughout to include the new 1747-OCF

266MHz Open Controller.

New Information

The table below shows where to find new information on the 1747-OCF

266MHz Open Controller.

For this new information: See Chapter:

comparing the 1747-OCE and 1747-OCF open controllers 1

compatibility issues between open controller models 1

setting the battery enable and scanner configuration jumpers 2

using the 1747-OCF BIOS 3

booting options for the 1747-OCF 4

defining interrupts and drive types 5

operating system considerations 5

installing software 6

using the USB port 7

using the diagnostic utility 8

specifications A

loading Windows NT on your 1747-OCF open controller B

Allen-Bradley HMIs

1747-UM001A-US-P - March 2000

SOC-2 Summary of Changes

Notes:

1747-UM001A-US-P - March 2000

Preface

Using This Manual

Who Should Use This Manual

Use this manual if you are responsible for designing, installing,

programming, or troubleshooting control systems that use the

Allen-Bradley open controller.

This manual is a guide for using the open controller. How you program the

open controller or how your application functions depends on the software

options you install on the open controller.

Additional Open Controller

Documentation

The following documents are available for additional information about the

open controller and its options.

This document:

Has this publication

number:

Open Controller User Manual 1747-UM001A-US-P

1747-OC Open Controller System Quick Start 1747-10.3

1747-OC 266MHz Open Controller System Quick Start 1747-10.6

Open Controller PCI Expansion Bus Installation Instructions 1747-5.16

Open Controller Video Interface Module Installation Instructions 1747-5.15

Open Controller Video and Ethernet Interface Module Installation

Instructions

1747-5.37

Open Controller Ethernet Interface Module Installation Instructions 1747-5.40

Open Controller PCMCIA Interface Module Installation Instructions 1747-5.13

Open Controller A-B Communication Interface Module Installation

Instructions

1747-5.14

Open Controller A-B Communication Interface Module User

Manual

1747-6.18

Adding an Embedded IDE Drive to 1747-OC Series Open

Controllers Installation Instructions

1747-IN002A-US-P

Adding System Memory to 1747-OC Series Open Controllers

Installation Instructions

1747-IN003A-US-P

Open Controller Chassis Fan Installation Instructions 1747-5.23

Open Controller IDE Interface Module for IDE-Compatible ATA

Devices (PC Cards) Installation Instructions

1747-5.29

Open Controller IDE Interface Module for an Internally-Mounted

2.5” ATA Drive Installation Instructions

1747-5.30

1747-OCE Open Controller API Software User Manual 1747-6.19

1746 I/O Interface and 1747-OCF Open Controller API Software

User Manual

1747-UM002A-US-P

Allen-Bradley HMIs

1747-UM001A-US-P - March 2000

P-2 Using This Manual

Each open controller component ships with installation instructions. The

user manuals and installation instructions are available from The

Automation Bookstore (www.theautomationbookstore.com) so you can

order or download as many copies as you need.

In addition to the above documentation, the:

• 1747-OCVGA1 video interface module and 1747-OCVGAE video and

Ethernet interface module include a disk with documentation for the

video drivers

• 1747-OCPCM2 PCMCIA interface module includes a disk with

CardSoft



documentation.

Reference Material

The following books might be useful as you develop your open controller

applications:

This document: By: Has this ISBN number:

PC System Architecture Series

PCI System Architecture

MindShare, Inc.

Addison-Wesley Publishing Company

ISBN: 0-201-40993-3

PC System Architecture Series

ISA System Architecture

MindShare, Inc.

Addison-Wesley Publishing Company

ISBN: 0-201-40996-8

PC System Architecture Series

PCMCIA System Architecture

MindShare, Inc.

Addison-Wesley Publishing Company

ISBN: 0-201-40991-7

The PCMCIA Developer’s Guide Michael T. Mori and W. Dean Welder ISBN: 0-9640342-1-2

PCI Hardware and Software Architecture and Design Edward Solari and George Willse ISBN: 0-929392-28-0

Table of Contents

Chapter 1

Introducing the Open Controller

Introducing the Open Controller CPU Module . . . . . . . . . . 1-1

Understanding the Open Controller Architecture . . . . . . . . 1-3

Communicating with the Open Controller . . . . . . . . . . . . . 1-5

Using the API software. . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Compatibility Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Open controller PCI-based option modules. . . . . . . . . . 1-6

Resource allocation . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

DOS API considerations . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Windows NT API considerations. . . . . . . . . . . . . . . . . . 1-7

Software not using the APIs . . . . . . . . . . . . . . . . . . . . . 1-8

Hardware differences . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Summary of API Differences. . . . . . . . . . . . . . . . . . . . . 1-9

Chapter 2

Installing the Open Controller

CPU Module

Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Preparing the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

1747-OCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

1747-OCF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Setting Jumpers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Installing System Memory . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Installing an Embedded IDE (Flash) Drive . . . . . . . . . . . . . 2-4

1747-OCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

1747-OCF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Changing the LED mask . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Inserting the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Chapter 3

Modifying BIOS Settings

Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Preparing the Open Controller. . . . . . . . . . . . . . . . . . . . . . 3-1

Changing BIOS Settings (using Open Controller Video

Module and Keyboard) . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Navigating the menu system. . . . . . . . . . . . . . . . . . . . . 3-2

Using the BIOS main menu on the 1747-OCE . . . . . . . . 3-3

Using the BIOS main menu on the 1747-OCF . . . . . . . . 3-4

Saving BIOS Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Storing BIOS Settings . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Restoring BIOS settings . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Remote BIOS setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Default BIOS Settings for the 1747-OCE . . . . . . . . . . . . . . . 3-7

Default BIOS Settings for the 1747-OCF . . . . . . . . . . . . . . . 3-12

Configuring BIOS for a Primary Drive in an

IDE Interface Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Allen-Bradley HMIs

Publication 1747-UM001A-US-P - March 2000

toc-ii Table of Contents

Chapter 4

Starting the Open Controller

Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Powering Up an Open Controller CPU Module. . . . . . . . . . 4-1

Booting when an operating system is loaded . . . . . . . . 4-3

Booting when an operating system is not loaded . . . . . 4-3

Booting from a remote PC through COM2. . . . . . . . . . . 4-5

Booting from a PC Card in a PCMCIA interface module. 4-7

Booting from an external, parallel-port floppy. . . . . . . . 4-10

Chapter 5

Defining System Settings

Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Defining System Interrupts . . . . . . . . . . . . . . . . . . . . . . . . 5-1

How ISA/EISA interrupts and PCI/PnP interrupts interact 5-2

Defining the primary IRQ (IRQ 14). . . . . . . . . . . . . . . . 5-4

Defining the secondary IRQ (IRQ 15) . . . . . . . . . . . . . . 5-4

Defining the interrupts for PC Cards in PCMCIA

interface modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Defining interrupts for a 1747-OCKTX,

-OCKTXD module . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Defining interrupts for the open controller SCANNER . . 5-7

Defining Drive Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Using primary drives . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Using secondary drives . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Using 3.5” IDE devices. . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Using Memory Managers . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

Operating System Considerations. . . . . . . . . . . . . . . . . . . . 5-9

Chapter 6

Installing Software

Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Installing Software onto a Native IDE Drive . . . . . . . . . . . . 6-1

Installing software from a remote PC through COM2 . . . 6-3

Installing software through DOS interlnk . . . . . . . . . . . 6-5

Installing software from an external, parallel-port floppy 6-6

Installing software from an external, parallel-port

SCSI device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Installing software from a PCMCIA CD-ROM or

ATA memory device . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

Installing software from an external, IDE-compatible device 6-9

Temporarily installing the native IDE drive in another PC 6-11

Installing Operating Systems . . . . . . . . . . . . . . . . . . . . . . . 6-15

Installing Windows NT . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16

Adding hardware to load Windows NT on the

open controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16

Adjusting the standard installation procedure to load

Windows NT on the open controller. . . . . . . . . . . . . . . 6-17

Publication 1747-UM001A-US-P - March 2000

Table of Contents toc-iii

Chapter 7

Using the Open Controller

Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Connecting the Keyboard and Mouse. . . . . . . . . . . . . . . . . 7-1

Using the Serial Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Using the Parallel Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

Using the Universal Serial Bus (USB) Port . . . . . . . . . . . . . 7-4

Using the External Watchdog Contact . . . . . . . . . . . . . . . . 7-5

Using the LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

STATUS indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

BATT indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7

COM1, COM2 indicators. . . . . . . . . . . . . . . . . . . . . . . . 7-7

LED 1, LED 2, LED 3, LED 4 indicators . . . . . . . . . . . . . 7-7

Chapter 8

Troubleshooting

Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Using the Diagnostics Utility . . . . . . . . . . . . . . . . . . . . . . . 8-1

Appendix A

Specifications

Open Controller CPU Module Specifications. . . . . . . . . . . . A-1

Approved System and Flash Memory Products . . . . . . . . . . A-4

Calculating Scan Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

Estimate minimum input scan time . . . . . . . . . . . . . . . . A-6

Estimate maximum input scan time. . . . . . . . . . . . . . . . A-6

Estimate minimum output scan time . . . . . . . . . . . . . . . A-7

Estimate maximum output scan time. . . . . . . . . . . . . . . A-7

Estimate output scan time plus processor overhead. . . . A-7

Open Controller CPU Module LED Templates . . . . . . . . . . A-8

Appendix B

Loading Windows NT on your

1747-OCF Open Controller

Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Appendix C

Handling the 1747-BA Battery

Storing the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

Handling the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

Transporting the 1747-BA Battery . . . . . . . . . . . . . . . . . . . C-1

Allen-Bradley HMIs

Publication 1747-UM001A-US-P - March 2000

toc-iv Table of Contents

1747-UM001A-US-P - March 2000

Chapter

1

Introducing the Open Controller

CPU Module

The open controller is a PC-based controller that resides in an

Allen-Bradley 1746 chassis. The open controller supports a range of

PC-based operating systems and software packages, including many

popular real-time operating systems (RTOS). There are two versions of the

open controller CPU module (Figure 1.1):

• 1747-OCE 5x86 class CPU

• 1747-OCF 266 MHz Pentium® class CPU

Both versions have a 8K-byte shared memory area that provides an

interface to an integrated 1746 local I/O scanner. The open controllers can

address all 1746 I/O and communication modules, including 1747-SN

remote I/O and 1747-SDN DeviceNet™ scanners. You can expand your

open controller system with a variety of PCI-based option modules that add

memory, communications, video display, etc.These option modules work

with either open controller CPU module.

The following table compares the features of the 1747-OCE and 1747-OCF

open controller CPU modules:

1747-OCE 1747-OCF

CPU processor 5x86 100 MHz 266 MHz Pentium®

Local I/O scanner processor 33 MHz AMD 188

System memory

1

(user-supplied)

DRAM (up to 64 Mbytes) SDRAM (up to 128 Mbytes)

512K byte battery-backed SRAM

Flash memory

1

(user-supplied)

1.3” FlashDrive™ (up to 160 Mbytes) Type I or II CompactFlash™ card (up to 192

Mbytes); or Type II 1” microdrive (170 or

340 Mbytes)

Note: The FlashDrive, CompactFlash, or microdrive will appear as an IDE hard drive to the

operating system

BIOS AMI BIOS™ General Software

Communication ports two isolated serial ports, configurable up to

115.2K bit/s:

COM1 - RS-232

COM2 - RS-232/422/485

one enhanced parallel port

same as 1747-OCE, plus:

Universal Serial Bus (USB) port

Connectors miniature PS/2 style DIN connector -

keyboard

two miniature PS/2 style DIN connectors -

keyboard and mouse

1 Refer to "Approved System and Flash Memory Products" on page A-4

Allen-Bradley HMIs

1747-UM001A-US-P - March 2000

1-2 Introducing the Open Controller

Figure 1.1

Front panel of a 1747-OCF and 1747-OCE series open controller CPU module

The open controller can address any valid 1746 chassis configuration. You

can interconnect as many as 3 chassis (for a maximum of 30 slots) to create

an expanded, local-chassis system for one open controller. Figure 1.2 shows

how to interconnect chassis.

Figure 1.2

Interconnecting 1746 chassis to create an expanded, local chassis

STATUS

BATT

COM 1

LED 1

LED 2

LED 3

LED 4

COM 2

OC 586 CPU

STATUS

BATT

COM 1

LED 1

LED 2

LED 3

LED 4

COM 2

OC 266 PENTIUM CPU

user-definable LEDs

3-position user-definable switch

serial port COM1

parallel port

1747-BA

lithium battery

keyboard port

reset switch

serial port COM2

reset switch

keyboard port

watchdog

timeout contact

mouse port

parallel port

USB port

status LEDs

1747-OCF 1747-OCE series

There is also a 2-position user-definable

jumper on the SCANNER circuit board on

both open controllers

The 1747-OCF

uses a coin-type

rechargeable

lithium vanadium

battery (enabled

by a jumper)

Use one of these interconnect cables:

1746-C7 to link chassis side by side

1746-C9 to link one chassis below the other

1746-C7

1746-C9

1747-UM001A-US-P - March 2000

Introducing the Open Controller 1-3

Understanding the Open

Controller Architecture

The architecture is basically the same for both open controllers. The

architecture consists of two CPUs (SCANNER and CONTROLLER) that

share dual-port memory. The SCANNER scans the 1746 local I/O bus and

reads/writes inputs and outputs to/from the dual-port registers. The

CONTROLLER has a PC-based architecture with either a 266 MHz

Pentium class CPU or 5x86 class CPU to run your application.

The dual port is an 8K byte memory partition that provides an interface

between the integrated SCANNER and your application software that

resides on the CONTROLLER. The 1747-OCE open controller uses an ISA

bus interface between the dual-port memory and the CONTROLLER. On

the 1747-OCF open controller, the dual-port memory and CONTROLLER

communicate across a PCI bus.

to 1746 PCI bus

dual-port memory

SCANNER

CONTROLLER (PC-based architecture)

188

CPU

bus

memory

SCANNER

software

to 1746

local I/O bus

266 MHz

Pentium

or 5x86

CPU

disk

bus

memory

BIOS

OS

application

software

open controller

CPU module

Partition: Bytes:

register 1K

commands variable

responses variable

output image variable

input image variable

host data variable

PCI bus (1747-OCF)

ISA bus (1747-OCE)

Allen-Bradley HMIs

1747-UM001A-US-P - March 2000

1-4 Introducing the Open Controller

Your application (the code you develop) uses the dual-port memory to

communicate with the SCANNER and to handle control functions on the

1746 backplane, such as:

• SCANNER commands and responses

• battery and SCANNER status

• scan rate frequency and timing

• I/O image counters

• priority messages and interrupts

• semaphores to ensure data integrity

• software-generated watchdogs

• control of the four user-definable LEDs, the 3-position switch, and the

2-position jumper

The SCANNER functionality of the dual port supports I/O control

functions, such as:

• synchronizing scans to the application

• forcing I/O

• discrete-input interrupts

• I/O module-driven interrupts (such as for the 1746-BAS module)

• I/O slot enables and disables

• I/O resets

In addition to providing access to the control SCANNER, the dual-port

memory also provides non-volatile storage for:

• I/O values

• application parameters (timers, counters, presets)

1747-UM001A-US-P - March 2000

Introducing the Open Controller 1-5

Communicating with the Open

Controller

Your CONTROLLER application software communicates with the

SCANNER to control I/O by reading and writing to the dual-port registers.

Your application can access the dual-port registers using:

• the function calls in the open controller API (application program

interface) to access dual-port registers

Choose 1747-OCAPID for DOS or 1747-OCAPINT for Windows NT

• a software package, such as SoftLogix 5 or Controlware, that have

built-in drivers that access the open controller dual-port registers

• the drivers you develop

The dual-port documentation is available through the A-B technology

licensing program. For more information, contact Rockwell Automation

Technical Services.

Using the API software

The APIs (1747-OCAPID for DOS and 1747-OCAPINT for Windows NT)

provide libraries of C function calls for interfacing with the open controller

dual-port memory. Each library provides calls for typical control functions,

such as:

• configure I/O files

• initialize the SCANNER

• define user LEDs, 3-position switch, 2-position jumper, and external

watchdog

• read CONTROLLER status

• read/write input/output data

• enable/disable forces

The APIs support Microsoft and Borland C compilers in the DOS and

Windows NT environments. The DOS API is compiled as a 16-bit

MS-DOS library using the 80386 instruction set. The Windows NT API is a

standard 32-bit DLL.

Allen-Bradley HMIs

1747-UM001A-US-P - March 2000

1-6 Introducing the Open Controller

Compatibility Issues

The 1747-OCE and 1747-OCF are compatible with Allen-Bradley 1746

chassis, I/O and power supplies, as well as existing open controller optional

modules and application code, except as noted in this section.

This section describes the major functional differences between the

1747-OCE and the 1747-OCF. The main focus is on differences that may

affect software developers, primarily as it relates to accessing the local I/O

scanner.

Open controller PCI-based option modules

All open controller option modules are compatible with the 1747-OCE and

the 1747-OCF, expect as noted in the following table:

Resource allocation

The open controller CPU interfaces with the local I/O scanner through an

8K byte dual port RAM and an interrupt request line. The most significant

difference between the two open controllers is how these resources are

mapped into the system.

On the 1747-OCE, the local I/O scanner interface is ISA-bus based which

requires you to configure the memory window and interrupt through

software.

The 1747-OCF scanner uses the PCI bus. The memory window and

interrupt are allocated by the system BIOS at system startup.

This revision level Of this option module

Is compatible with

this open controller

ALL rev. levels A-B Communications Module

cat. no. 1747-OCKTX/D

1747-OCE

Rev. D01 and above only A-B Communications Module

cat. no. 1747-OCKTX/D

1747-OCF

1747-UM001A-US-P - March 2000

Introducing the Open Controller 1-7

DOS API considerations

An application using the open controller DOS API on the 1747-OCE must

select an unused 8K byte memory window address and interrupt line for the

local I/O scanner. These values are passed to the API in the

OC_OpenScanner function call. For example, the following statement

would configure the memory window at C800:0000H, and select interrupt

request 11:

OC_OpenScanner(&Handle, 0xC800, 11)

When running on the 1747-OCF, the memory window and interrupt

parameters are ignored. The OC_OpenScanner function will first search the

PCI bus for the local I/O scanner, and the values that were allocated by the

BIOS are used. This allows you to use the same code for both open

controllers since any parameters entered for the 1747-OCE will simply be

ignored if you are using a 1747-OCF.

The open controller DOS API version 1.04 has been modified to support the

1747-OCF. The DOS API is a static library; therefore, any applications

developed with earlier versions (1.03 and earlier) of the DOS API will have

to be re-linked with the updated API in order to be used with the 1747-OCF.

Contact Rockwell Automation Technical Services for information about

updating your API software.

Windows NT API considerations

The open controller Windows NT API consists of two components:

• a device driver

• a DLL

The device driver is responsible for allocating the dual port register (DPR)

memory window and interrupt. The device driver searches the PCI bus for

the 1747-OCF scanner and uses the resources allocated by the BIOS.

The NT API functions are contained within a DLL. It is not necessary to

make any changes to or re-link existing 1747-OCE applications that will be

used on the 1747-OCF, unless unsupported API functions are used (see

Summary of API Differences later in this chapter). All that is required is

that the new device driver and DLL be installed (version 1.03 or later of the

NT API). Contact Rockwell Automation Technical Services for information

about updating your API software.

Allen-Bradley HMIs

1747-UM001A-US-P - March 2000

1-8 Introducing the Open Controller

Software not using the APIs

Software that does not use the open controller APIs must be modified to

find the 1747-OCF scanner and retrieve the assigned resources. Sample

code that performs this function is available upon request from Rockwell

Automation Technical Services.

Hardware differences

The following features of the 1747-OCE are either not present on the

1747-OCF, or are implemented differently.

Battery backup of dual-port memory

The dual-port memory is battery backed on the 1747-OCE. It is not battery

backed on the 1747-OCF.

Scanner reset

The controller CPU has the ability to reset the local I/O scanner. This

function is implemented differently in hardware on the 1747-OCF than on

the 1747-OCE. The difference is transparent to users of the DOS or NT

APIs. Software not using the APIs (or NT device driver) must be modified.

Sample code which performs this function is available upon request from

Rockwell Automation Technical Services.

Real-time clock SRAM

The 1747-OCE includes 4K bytes of static RAM within the real-time clock.

This SRAM is not available on the 1747-OCF.

The following API functions will return an error if used with the 1747-OCF:

OC_ReadRtcSRAM

OC_WriteRtcSRAM

Static RAM

The 1747-OCF includes 512K bytes of battery-backed static RAM. This

SRAM is not available on the 1747-OCE.

The following NT API functions are available for the 1747-OCF only, and

will return an error if used with the 1747-OCE:

Important:You must write the output image data into the dual-port register

before changing your open controller to scan mode. We

recommend that you do this for both the 1747-OCE and the

1747-OCF

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