DVP-ES2/EX2/SS2/SA2/SX2/SE&TP Operation Manual - Programming 1.5 Ladder Logic Symbols The following table displays list of WPLSoft symbols their description, command, and memory registers that are able to use the symbol. 1-4 C (Counter) (Relay) (Word) (Dword) Bit, word or double word memory used for counting and has coil, contact and register in it. The counter count once (1 pulse) when the coil goes from OFF to ON. When the predefined counter value is reached, the associated contact will be energized. There are 16-bit and 32-bit high-speed counters available for users. Device indication: Indicated as C and numbered in decimal, e.g.
C0, C1, C2…C255 D (Data register) (Word) Word memory stores values and parameters for data operations. Every register is able to store a word (16-bit binary value). A double word will occupy 2 consecutive data registers. Device indication: Indicated as D and numbered in decimal, e.g. D0, D1, D2…D4999 E, F (Index register) (Word) Word memory used as a modifier to indicate a specified device (word and double word) by defining an offset. Index registers not used as a modifier can be used as general purpose register. Device indication: indicated as E0 ~ E7 and F0 ~ F7.
Ladder Diagram Explanation Instruction Available Devices Structure NO (Normally Open) contact / A contact LD X, Y, M, S, T, C NC (Normally Closed) contact / B contact LDI X, Y, M, S, T, C NO contact in series AND X, Y, M, S, T, C NC contact in series ANI X, Y, M, S, T, C NO contact in parallel OR X, Y, M, S, T, C NC contact in parallel ORI X, Y, M, S, T, C Rising-edge trigger switch LDP X, Y, M, S, T, C Falling-edge trigger switch LDF X, Y, M, S, T, C Rising-edge trigger in series ANDP X, Y, M, S, T, C Falling-edge trigger in series ANDF X, Y, M, S, T, C Rising-edge trigger in parallel ORP X, Y, M, S, T, C Falling-edge trigger in parallel ORF X, Y, M, S, T, C Block in series ANB None Block in parallel ORB None