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DVP-ES2/EX2/SS2/SA2/SX2/SE 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……………………………………………………………………. 1-4 1.5 Ladder Logic Symbols………………………………………………………………………… 1-5 1.5.1 Creating a PLC Ladder Program…………………………………………………... 1-6 1.5.2 LD / LDI (Load NO contact / Load NC contact)………………………
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3.2 Explanations to Basic Instructions…………………………………………………………... 3-3 3.3 Pointers………………………………………………………………………………………… 3-12 3.4 Interrupt Pointers……………………………………………………………………………… 3-12 3.5 Application Programming Instructions……………………………………………………… 3-14 3.6 Numerical List of Instructions (classified according to the function)…………………….. 3-24 3.7 Numerical List of Instructions (in alphabetic order)……………………………………….. 3-33 3.8 Detailed Instruction Explanation…………………………………………………………….. 3-42 4 Communications
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7.4 Sending SDO, NMT and Reading Emergency Message through the Ladder Diagram... 7-15 7.4.1 Data Structure of SDO Request Message………………………………………... 7-15 7.4.2 Data Structure of NMT Message…………………………………………………... 7-18 7.4.3 Data Structure of EMERGENCY Request Message…………………………….. 7-19 7.4.4 Example on Sending SDO through the Ladder Diagram……………………….. 7-21 7.5 Indicators and Troubleshooting…………………………………………………………........ 7-23 7.5.1 Description of Indicators…………………………………………………………..... 7-23 7.5.
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The DVP-ES2 series PLCs, the DVP-ES2-C series PLCs, the DVP-EX2 series PLCs, the DVP-SS2 series PLCs, the DVP-SA2 series PLCs, the DVP-SX2 series PLCs, and the DVP-SE series PLCs are listed below. Series Model name DVP16ES200R, DVP16ES200T, DVP24ES200R, DVP24ES200T, DVP32ES200R, DVP32ES200T, DVP32ES211T, DVP40ES200R, DVP-ES2 DVP40ES200T, DVP60ES200R, DVP60ES200T, DVP32ES200RC, DVP32ES200TC DVP-ES2-C DVP32ES200RC, DVP32ES200TC DVP20EX200R, DVP20EX200T, DVP30EX200R, DVP30EX200T DVP-EX2
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PLC Concepts This chapter introduces basic and advanced concepts of ladder logic, which is the mostly adopted programming language of PLC. Users familiar with the PLC concepts can move to the next chapter for further programming concepts. However, for users not familiar with the operating principles of PLC, please refer to this chapter to get a full understanding of PLC concepts. Chapter Contents 1.1 PLC Scan Method .............................................................
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Device Memory DVP-ES2/EX2/SS2/SA2/SX2/SE Operation Manual - Programming 1.1 PLC Scan Method PLC utilizes a standard scan method when evaluating user program. Scanning process: Read the physical input status and store the data in internal Scan input status memory. Evaluate the user program with data stored in internal memory. Program scanning starts from up to down and left to right until Evaluate user program reaching the end of the program. Refresh the outputs Write the evaluated
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1. PLC Concepts Scan time exception PLC can process certain items faster than the scan time. Some of these items interrupts and halt the scan time to process the interrupt subroutine program. A direct I/O refresh instruction REF allows the PLC to access I/O immediately during user program evaluation instead of waiting until the next scan cycle. 1.2 Current Flow Ladder logic follows a left to right principle. In the example below, the current flows through paths started from either X0
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DVP-ES2/EX2/SS2/SA2/SX2/SE Operation Manual - Programming 1.4 PLC Registers and Relays Introduction to the basic internal devices in a PLC Bit memory represents the physical input points and receives external input X signals. (Input Relay) Device indication: Indicated as X and numbered in octal, e.g. X0~X7, X10~X17…X377 Bit memory represents the physical output points and saves the status to be Y refreshed to physical output devices. (Output Relay) Device indication: Indicated a
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1. PLC Concepts 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. Ladder Diagram Explanation Instruction Available Devices Structure NO (Normally Open) LD X, Y, M, S, T, C contact / A contact NC (Normally Closed) LDI X, Y, M, S, T, C contact / B contact 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
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DVP-ES2/EX2/SS2/SA2/SX2/SE Operation Manual - Programming Ladder Diagram Explanation Instruction Available Devices Structure MPS Multiple output branches MRD None MPP Output coil OUT Y, M, S S Step ladder STL S Basic instructions and API Basic / Application - instructions. Please refer to instruction chapter 3 Instruction Set Inverse logic INV None 1.5.1 Creating a PLC Ladder Program The editing of the program should start from the left side bus line to the
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1. PLC Concepts Execution order of the sample program: 1 LD X0 2 OR M0 3 AND X1 4 LD X3 AND M1 ORB 5 LD Y1 AND X4 6 LD T0 AND M3 ORB 7 ANB 8 OUT Y1 TMR T0 K10 1.5.2 LD / LDI (Load NO contact / Load NC contact) LD or LDI starts a row or block LD instruction LD instruction AND block OR block 1.5.3 LDP / LDF (Load Rising edge trigger/ Load Falling edge trigger) Similar to LD instruction, LDP and LDF instructions only act at the rising edge
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DVP-ES2/EX2/SS2/SA2/SX2/SE Operation Manual - Programming 1.5.6 OR / ORI (Connect NO contact in parallel / Connect NC contact in parallel) OR (ORI) instruction connects a NO (NC) in parallel with another device or block. OR instruction OR instruction OR instruction 1.5.7 ORP / ORF (Connect Rising edge in parallel/ Connect Falling edge in parallel) Similar to OR instruction, ORP (ORF) instruction connects rising (falling) edge triggers in parallel with another device or block 1.5.8
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1. PLC Concepts Branch Branch Description instruction Symbol Start of branches. Stores current result of MPS ┬ program evaluation. Max. 8 MPS-MPP pairs can be applied Reads the stored current result from previous ├ MRD MPS End of branches. Pops (reads then resets) the MPP └ stored result in previous MPS Note: When compiling ladder diagram with WPLSoft, MPS, MRD and MPP could be automatically added to the compiled results in instruction format. However, sometimes the branch ins
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DVP-ES2/EX2/SS2/SA2/SX2/SE Operation Manual - Programming M1002 SET M1002 S0 initial S0 pulse S S0 SET S21 S21 S SET S22 S21 S22 e S0 S S22 RET 1.5.12 RET (Return) RET instruction has to be placed at the end of sequential control process to indicate the completion of STL flow. S20 e S RET S20 e S RET Note: Always connect RET instruction immediately after the last step point indicated as the above diagram otherwise program error may occur. 1-10
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1. PLC Concepts 1.6 Conversion between Ladder Diagram and Instruction List Mode Ladder Diagram Instruction LD X0 OR block X0 X2 X1 OR X1 Y0 LD X2 OR X1 M0 C0 OR M0 block SET S0 ORI M1 M1 Block in series ANB Y0 M2 LD M2 AND block AND Y0 Block in parallel ORB The output continues AN I X1 ANI S0 X10 based on OUT Y0 S Y10 status of Multiple AND C0 outputs SET S0 SET S10 Start of step ladder STL S0 S0 status operates with X10
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DVP-ES2/EX2/SS2/SA2/SX2/SE Operation Manual - Programming 1.7 Fuzzy Syntax Generally, the ladder diagram programming is conducted according to the “up to down and left to right” principle. However, some programming methods not following this principle still perform the same control results. Here are some examples explaining this kind of “fuzzy syntax.” Example 1: X0 X2 X4 Better method OK method LD X0 LD X0 X1 X3 X5 OR X1 OR X1 LD X2 LD X2 OR X3 OR X3 ANB LD X4 LD X4 OR X5 OR X5
