DVP-ES2/EX2/SS2/SA2/SX2/SE&TP Operation Manual Programming Contents 1 PLC Concepts 1.1 PLC Scan Method .................................................................................... 1-2 1.2 Current Flow ............................................................................................. 1-3 1.3 NO Contact, NC Contact .......................................................................... 1-3 1.4 PLC Registers and Relays ....................................................................... 1-3 1.5 Ladder Logic Symbols ..............................................................................
1-3 1.5.1 Creating a PLC Ladder Program ....................................................... 1-5 1.5.2 LD / LDI (Load NO contact / Load NC contact) ................................. 1-6 1.5.3 LDP / LDF (Load Rising edge trigger/ Load Falling edge trigger) ...... 1-6 1.5.4 AND / ANI (Connect NO contact in series / Connect NC contact in series) ............................................................................................... 1-6 1.5.5 ANDP / ANDF (Connect Rising edge in series/ Connect Falling edge in series) ...............................................................................................
1-6 1.5.6 OR / ORI (Connect NO contact in parallel / Connect NC contact in parallel) ............................................................................................. 1-6 1.5.7 ORP / ORF (Connect Rising edge in parallel/ Connect Falling edge in parallel) ............................................................................................. 1-6 1.5.8 ANB (Connect block in series) .......................................................... 1-6 1.5.9 ORB (Connect block in parallel) ........................................................ 1-7 1.5.10 MPS / MRD / MPP (Branch instructions) ...........................................
1-7 1.5.11 STL (Step Ladder Programming) ....................................................... 1-7 1.5.12 RET (Return) ..................................................................................... 1-8 1.6 Conversion between Ladder Diagram and Instruction List Mode .............
1-9 1.7 Fuzzy Syntax ...........................................................................................1-10 1.8 Correcting Ladder Diagram .....................................................................1-11 1.9 Basic Program Design Examples ............................................................1-13 2 Programming Concepts 2.1 ES2/EX2 Memory Map ............................................................................. 2-2 2.2 SS2 Memory Map ..................................................................................... 2-4 2.3 SA2/SX2 Memory Map .............................................................................
2-6 2.4 SE Memory Map .......................................................................................
2-8 2.5 Status and Allocation of Latched Memory ...............................................2-10 2.6 PLC Bits, Nibbles, Bytes, Words, etc.......................................................2-11 2.7 Binary, Octal, Decimal, BCD, Hex ...........................................................2-11 2.8 M Relay ...................................................................................................2-12 2.9 S Relay ....................................................................................................2-24 2.10 T (Timer) ..................................................................................................2-24 2.11 C (Counter) ..............................................................................................2-25 i