DVP-PLC Application Examples C O N T E N T S 1. Basic Program Design Examples 1.1 Normally Closed Contact in Series Connection........................................ 1-1 1.2 Block in Parallel Connection................................................................... 1-2 1.3 Rising-edge Pulse Output for One Scan Cycle......................................... 1-3 1.4 Falling-edge Pulse Output for One Scan Cycle ........................................ 1-4 1.5 Latching Control Circuit.......................................................................... 1-5 1.6 Interlock Control Circuit .........................................................................
1-6 1.7 Automatic Parameter Initialization When Powered Up .............................. 1-7 1.8 Common Latched Circuit and SET/RST Instructions Application ............... 1-8 1.9 SET/RST - Latched and Unlatched Circuit............................................... 1-9 1.10 Alternate Output Circuit (With Latched Function) ................................... 1-10 1.11 Conditional Control Circuit .................................................................... 1-12 1.12 First-in Priority Circuit .......................................................................... 1-13 1.13 Last-in Priority Circuit ..........................................................................
1-15 1.14 Entry/Exit Control of the Underground Car Park..................................... 1-16 1.15 Forward/Reverse Control for the Three-Phase Asynchronous Motor ....... 1-18 1.16 Selective Execution of Programs .......................................................... 1-19 1.17 MC/MCR - Manual/Auto Control ............................................................ 1-21 1.18 STL Manual/Auto Control...................................................................... 1-24 2. Counter Design Examples 2.1 Product Mass Packaging ........................................................................ 2-1 2.2 Daily Production Record (16-bit Counting Up Latched Counter)................
2-2 2.3 Products Amount Calculation (32-bit Counting Up/Down Counter) ............ 2-4 2.4 24-hour Clock Operated by 3 Counters ................................................... 2-5 i