Date:29.09.2014 File:GRAPH_02e.1 SIMATIC S7 Siemens AG 2000. All rights reserved. SITRAIN Training for Automation and Drives Project Planning and Configuration. - презентация

1 Date: File:GRAPH_02e.1 SIMATIC S7 Siemens AG All rights reserved. SITRAIN Training for Automation and Drives Project Planning and Configuration

2 Date: File:GRAPH_02e.2 SIMATIC S7 Siemens AG All rights reserved. SITRAIN Training for Automation and Drives Planning and Configuration

3 Date: File:GRAPH_02e.3 SIMATIC S7 Siemens AG All rights reserved. SITRAIN Training for Automation and Drives Step: Step No. (No. max. 999) and step name (max. 24 contiguous characters) Initial step: Execution start without querying a start transition after sequencer RESET (INIT_SQ) or return jump or initial start of the sequencer Transition The transition contains the conditions which allow mode- dependent enabling from one step to the successor step. S3 Step 3 S1 Step 1 T5 trans5 Basic Elements of a Sequencer (1)

4 Date: File:GRAPH_02e.4 SIMATIC S7 Siemens AG All rights reserved. SITRAIN Training for Automation and Drives S xxx End of sequencer Switches off the sequencer completely when end of sequencer is reached. The sequencer can only be started again by selective enabling of a step in this sequencer (e.g. initial step or via step selection) Application: tasks that are executed once, e.g. approach / retract program Jump to a step (forwards or backwards) Application: cyclic execution, machine loop Basic Elements of a Sequencer (2)

5 Date: File:GRAPH_02e.5 SIMATIC S7 Siemens AG All rights reserved. SITRAIN Training for Automation and Drives Open alternative branch Application: left branch error-free, right branch with errors Only one branch can be active in automatic and inching mode. The transition in the left branch always has priority 1, all other transitions according to the ascending transition no. Execution is from top to bottom and left to right. Close alternative branch The corresponding branch is also closed for execution to the left. Evolution is from top to bottom and right to left. 1st priority2nd priority Priority sequence in limit case: all Tx simultaneously satisfied Basic Elements of a Sequencer (3)

6 Date: File:GRAPH_02e.6 SIMATIC S7 Siemens AG All rights reserved. SITRAIN Training for Automation and Drives Open simultaneous branch Synchronization of all associated steps after the opening branch in the same PLC cycle. Then each branch is independently executed. Possible to enable all branches in the same PLC cycle First steps are also called opening steps Close simultaneous branch Synchronization at joining, i.e. all branches wait for one another until all steps preceding the closing branch are active. Only then is execution switched simultaneously to the left branch via the successor transition. Last steps are also called closing steps. Basic Elements of a Sequencer (4)

7 Date: File:GRAPH_02e.7 SIMATIC S7 Siemens AG All rights reserved. SITRAIN Training for Automation and Drives Basic Elements of a Sequencer (5)

8 Date: File:GRAPH_02e.8 SIMATIC S7 Siemens AG All rights reserved. SITRAIN Training for Automation and Drives Display always as S7-GRAPH sequencer Save Save As... Open/ Insert GRAPH source Source files Save Save As... Open/ Insert S7 block Blocks S1 Generate Source Compile (Compiler) Test run possible!No test run possible! Sequencer as FB S13 T1T13 Sequencer as GRAPH source file S1S13 T1T13 S1 Symbols Entry/use in STEP 7 symbol list Storing a Sequencer

9 Date: File:GRAPH_02e.9 SIMATIC S7 Siemens AG All rights reserved. SITRAIN Training for Automation and Drives Creating, Opening and Saving a Sequencer as GRAPH Source File

10 Date: File:GRAPH_02e.10 SIMATIC S7 Siemens AG All rights reserved. SITRAIN Training for Automation and Drives How to Use the S7 - GRAPH Source Editor

11 Date: File:GRAPH_02e.11 SIMATIC S7 Siemens AG All rights reserved. SITRAIN Training for Automation and Drives Important: Before opening the FB you must have selected "GRAPH" as the language it was created in! (cannot be edited later) Creating, Opening and Saving a Sequencer as FB (+DB)

12 Date: File:GRAPH_02e.12 SIMATIC S7 Siemens AG All rights reserved. SITRAIN Training for Automation and Drives INI 1 proximity switch LS 1 Light barrier M 1 Motor H 1 LED S 1 Acknowledge switch L R Final assembly Bay 1 Assembly model ON/OFF S 1 S 2 S 3 T 1 T 2 ? Exercise (1): Assembly Line with 1 Bay

13 Date: File:GRAPH_02e.13 SIMATIC S7 Siemens AG All rights reserved. SITRAIN Training for Automation and Drives S 1 S 2 S 3 T 1 T 2 Exercise (1): Assembly Line with 1 Bay (Contd.)

14 Date: File:GRAPH_02e.14 SIMATIC S7 Siemens AG All rights reserved. SITRAIN Training for Automation and Drives Assembly line with 1 bay S 1 S 2 S 3 T 1 T 2 Exercise (2): Save Sequencer as FB1 (+DB1)

15 Date: File:GRAPH_02e.15 SIMATIC S7 Siemens AG All rights reserved. SITRAIN Training for Automation and Drives Assembly line with 1 bay S 1 S 2 S 3 T 1 T 2 Exercise (3): Check FB1 (+DB1) in STEP 7