Page 16-67

Note: The option Stiff is also available for graphical solutions of differential

equations.

Numerical solution to ODEs with the SOLVE/DIFF menu

The SOLVE soft menu is activated by using 74 MENU in RPN mode. This menu

is presented in detail in Chapter 6. One of the sub-menus, DIFF, contains

functions for the numerical solution of ordinary differential equations for use in

programming. These functions are described next using RPN mode and system

flag 117 set to SOFT menus. (See note in page 16-75).

The functions provided by the SOLVE/DIFF menu are the following:

Function RKF

This function is used to compute the solution to an initial value problem for a

first-order differential equation using the Runge-Kutta-Fehlbert 4

th

-5

th

order

solution scheme. Suppose that the differential equation to be solved is given by

dy/dx = f(x,y), with y = 0 at x = 0, and that you will allow a convergence

criteria ε for the solution. You can also specify an increment in the independent

variable, Δx, to be used by the function. To run this function you will prepare

your stack as follows:

3: {‘x’, ‘y’, ‘f(x,y)’}

2: { εΔx }

1: x

final

The value in the first stack level is the value of the independent variable where

you want to find your solution, i.e., you want to find, y

final

= f

s

(x

final

), where f

s

(x)

represents the solution to the differential equation. The second stack level may

contain only the value of ε, and the step Δx will be taken as a small default

value. After running function @@RKF@@, the stack will show the lines:

2: {‘x’, ‘y’, ‘f(x,y)’}

1: ε

1 2 ... 539 540 541 542 543 544 545 546 547 548 549 ... 886 887

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Western Reserve Controls 1782-JDC manuály

Uživatelské manuály a uživatelské příručky pro Brány / ovladače Western Reserve Controls 1782-JDC.
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Western reserve controls 1782-JDC Uživatelský manuál (27 strany)

Značka: Western-reserve-controls | Kategorie: Gateways/controllers | Velikost: 0.39 MB |

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1782-JDC

1

DeviceNet/Serial Gateway

1

User’s Manual

1

TABLE OF CONTENTS

3

TABLE OF FIGURES

4

LIST OF TABLES

4

1. Overview

5

1.1 Features

6

1.3 Basic Operation

6

1.5 EDS

7

2. Quick Start

8

3. General Specifications

11

4.1 Overview

13

4.2 LED Operation

13

4.3 RS232/RS485 Connector

14

4.4 DeviceNet Configuration

14

4.4.1 Network Termination

15

CONVERTER

16

DEVICENET

16

A. Appendix

19

Western reserve controls 1782-JDC Uživatelský manuál (26 strany)

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1782-JDM

1

DeviceNet™-Modbus Gateway

1

User’s Manual

1

TABLE OF CONTENTS

3

LIST OF TABLES

4

LIST OF FIGURES

4

1 Overview

5

1.1 Features

6

1.3 JDM Basic Operation

7

1.5 EDS

8

2 Quick Start

9

3.1 Overview

14

3.2 LED Operation

15

3.3 RS232/RS485 Connector

16

3.4 Power Requirements

16

3.5 Network Configuration

16

3.5.1 Network Termination

17

3.6 Software Configuration

18

5 General Specifications

23

7 Troubleshooting

26

Western reserve controls 1782-JDC Uživatelský manuál (34 strany)

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1782-JDM

1

DeviceNet™-ModBus Gateway

1

User’s Manual

1

TABLE OF CONTENTS

3

LIST OF TABLES

4

LIST OF FIGURES

4

1 Overview

5

1.1 Features

6

1.1 Product Family Selection

6

1.4 JDM Basic Operation

7

1.4.1 Polled I/O

8

1.6 EDS

9

2 Quick Start

10

3.1 Overview

15

3.2 LED Operation

16

3.3 Serial Port Connectors

17

3.4 Power Requirements

17

4 Software Configuration

21

6 General Specifications

26

7 ModBus Protocol

28

8 Troubleshooting

29

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