The right reaction. Event handling in applications and libraries

Transcription

1 The right reaction. Event handling in applications and libraries Jouni Rikkonen, SKS Control CODESYS Users Conference 2016 CODESYS a trademark of 3S-Smart Software Solutions GmbH

2 Agenda 1 2 What is considered an event by a PLC programmed according to IEC 61131? Event handling in the application 3 Event handling in libraries 4 Conclusion 2

3 What does the term event mean? Something is changing. What can change in terms of PLCs? The state of inputs The application Online change Download The operating status of the application Start Stop Event handling in applications and libraries What is considered an event by a PLC programmed according to IEC 61131? 3

4 What is considered an event by a PLC programmed according to IEC 61131? General principle Monitor Register inputs (Process image) Write outputs (Process image) Decide Act Application logic 4

5 What is considered an event by a PLC programmed according to IEC 61131? Proven structure Register inputs (Process image) Write outputs (Process image) Pre-process inputs Abstraction Validation Command output Abstraction Interlock Application logic 5

6 What is considered an event by a PLC programmed according to IEC 61131? Events inside the application Example traffic lights 1 2 Commands and monitors Crossing 1 2 Traffic lights Commands and monitors Traffic lights r 6

7 What is considered an event by a PLC programmed according to IEC 61131? Events inside the application Example traffic lights 1 2 Red lamp light 1 broken! Red lamp broken! broken! 1 Traffic lights Crossing 2 Traffic lights 7

8 Events inside the application Event handling in applications and libraries What is considered an event by a PLC programmed according to IEC 61131? 1 2 Red lamp broken! broken! Traffic lights Two options: Classic: The traffic lights s monitors the lamp. When interfaces and methods are used: The lamp informs the traffic lights. 8

9 Agenda 1 2 What is considered an event by a PLC programmed according to IEC 61131? Event handling in the application 3 Event handling in libraries 4 Conclusion 9

10 Event handling in the application Use the events existing in the task configuration Functions as event handlers for pre-set system events List of potential events Online help The function is automatically created registered with the right interface. Contents of function are defined by the application user. 10

11 Event handling in the application Use the events existing in the task configuration Component-Id Unambiguous ID consisting of Vendor ID Individual component ID Event parameter Deliver parameter structure as VAR_IN_OUT to the function Structure typ depending on event Identification via Parameter-Id Parameter version 11

12 Event handling in the application Use the events existing in the task configuration Example: Event StartDone 12

13 Event handling in the application Use the events existing in the task configuration Example: Event StopDone 13

14 Agenda 1 2 What is considered an event by a PLC programmed according to IEC 61131? Event handling in the application 3 Event handling in libraries 4 Conclusion 14

15 Event handling in libraries Register to existing events Example in the CODESYS Store: EventManager Potential event handlers Functions Methods In FB_Init Open event heventstart := EventOpen(EVT_StartDone, CMPID_CmpApp, Result); Register Interface of own FBD heventstop := EventOpen(EVT_StopDone, CMPID_CmpApp, Result); Do not forget! In FB_Exit De-register interface de EventUnregisterCallback(hEventStart, hinterfacestart); 15

16 Event handling in libraries Register to existing events Runtime system components define the event stock 16

17 Event handling in libraries Register to existing events Also possible: Usage of attributes E. g. 17

18 Event handling in libraries Own event 1. Define event and event parameter 2. Create event parameter 3. Register at the event manager 4. Register to own event (see: Register to existing events) 5. Send the event 18

19 Event handling in libraries Own event 1. Define Event and event parameter 19

20 Event handling in libraries Own event 2. Create event parameter 3. Register at the event manager Create the event 20

21 Event handling in libraries Own event 4. Register to own event (see: Register to existing events) 21

22 Event handling in libraries Own event 5. Let the party begin! 22

23 1 2 What is considered an event by a PLC programmed according to IEC 61131? Event handling in the application 3 Event handling in libraries 4 Conclusion 23

24 The term event is not always defined in an unambiguous way. Classic cyclic application processing can handle hundreds of signals all of which can change at the same time. Order or priority setting are not relevant. Functionality can be registered to system events either in the application, or in libraries. Users can create and use their own events. Conclusion 24

25 Inspiring Automation Solutions Thank you for your attention. CODESYS is a registered trademark of 3S-Smart Software Solutions GmbH. Technical specifications are subject to change. Errors and omissions excepted. No reproduction or distribution, in whole or in part, without prior permission. 25

26 Korrekturen Layout // SBa // Übersetzung// BH //

27 Einzelne Vorlagen zur Kopie Umblätterecke 27

28 Einzelne Vorlagen zur Kopie Umblätterecke 28