Siemens S7-200 User Manual download pdf (Page 27)

Edge Detection (2)

In our "Two-way Switch",

is therefore used to pass on a signal to

the subsequent logic operations only at

the moment that the button at I0.0 is

pressed.

Correspondingly, the contact

for detecting falling edges is closed

for the duration of one cycle in the

event of changes from "true" to

"untrue".

The contact for detecting rising

edges is closed for the duration of one

cycle when the series connected contact

changes from "untrue" to "true"

And this is how

you enter it ...

8mark

Ëedge

Pulse-operated switch

- Introduction

- Solution Overview

- Edge Detection

- Bit Memories

- Solution Description and Test

1. Use the mouse to mark the position

to be replaced by an edge detection.

3. Select ”Rising edge” or ”Falling

edge” from the list that then appears.

In STEP 7-Micro/WIN, open the exercise project "a:\d03.mwp" from diskette.

This project is also incomplete and will be finished step by step.

2. Select ”Contacts” with a single

mouse click from the list for

operation families.

Pulse-Operated Switch

Latching Revision

Pulse Opera-

ted Switch

Off-Delay

Timer

Sequencer Appendix

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 73 74

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Siemens S7-200 User Manual Page 27