12
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instructions Edition
Table of Contents
34. SFC Program and Step Ladder
34.1.1 Outline ....................................................................................................................................... 733
34.1.2 Explanation of function and operation ....................................................................................... 733
34.1.3 SFC program creating procedure .............................................................................................. 734
34.1.4 Handling and role of initial state relay........................................................................................ 738
34.1.5 Latched (battery backed) type state relays................................................................................ 739
34.1.6 Role of RET instruction.............................................................................................................. 739
34.1.7 Preliminary knowledge for creating SFC program..................................................................... 739
34.1.8 SFC flow formats ....................................................................................................................... 747
34.1.9 Program of branch/recombination state relays.......................................................................... 750
34.1.10 Rule for creating branch circuit................................................................................................ 751
34.1.11 Program examples .................................................................................................................. 756
34.2.1 Outline ....................................................................................................................................... 765
34.2.2 Explanation of function and operation ....................................................................................... 765
34.2.3 Expression of step ladder .......................................................................................................... 766
34.2.4 Creation of step ladder program (SFC program
→
STL program) ............................................ 767
34.2.5 Preliminary knowledge for creating step ladder programs ........................................................ 768
34.2.6 Program with state relays in branches and recombination........................................................ 771
34.2.7 Program examples .................................................................................................................... 775
35. Interrupt Function and Pulse Catch Function
35.1 Outline....................................................................................................................................... 781
35.2 Common Items.......................................................................................................................... 782
35.2.1 How to disable interrupt function and pulse catch function ....................................................... 782
35.2.2 Related items............................................................................................................................. 783
35.2.3 Cautions on use (common) ....................................................................................................... 784
35.3.1 Input interrupt (interrupt triggered by external signal) [without delay function] .......................... 786
35.3.2 Examples of practical programs (programs to measure short pulse width)............................... 790
35.4 Input interrupt (Interrupt by External Signal) [With Delay Function] .......................................... 792
35.5 Timer Interrupt (Interrupt in Constant Cycle)............................................................................. 793
35.5.1 Timer interrupt (interrupt in constant cycle) ............................................................................... 793
35.5.2 Examples of practical program (timer interrupt programs using applied instruction)................. 794
35.6 Counter Interrupt - Interrupt Triggered by Counting Up of High Speed Counter....................... 797
35.7 Pulse Catch Function [M8170 to M8177] .................................................................................. 798