i
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)…………………………………... 1-7
1.5.3 LDP / LDF (Load Rising edge trigger/ Load Falling edge trigger)……………… 1-7
1.5.4 AND / ANI (Connect NO contact in series / Connect NC contact in series)…... 1-7
1.5.5 ANDP / ANDF (Connect Rising edge in series/ Connect Falling edge in
series)………………………………………………………………………………….
1-7
1.5.6 OR / ORI (Connect NO contact in parallel / Connect NC contact in parallel)…. 1-8
1.5.7 ORP / ORF (Connect Rising edge in parallel/ Connect Falling edge in
parallel)………………………………………………………………………………..
1-8
1.5.8 ANB (Connect block in series)……………………………………………………... 1-8
1.5.9 ORB (Connect block in parallel)……………………………………………………. 1-8
1.5.10 MPS / MRD / MPP (Branch instructions)………………………………………….. 1-8
1.5.11 STL (Step Ladder Programming)…………………………………………………... 1-9
1.5.12 RET (Return)…………………………………………………………………………. 1-10
1.6 Conversion between Ladder Diagram and Instruction List Mode………………………… 1-11
1.7 Fuzzy Syntax…………………………………………………………………………………… 1-12
1.8 Correcting Ladder Diagram…………………………………………………………………… 1-14
1.9 Basic Program Design Examples……………………………………………………………. 1-16
2 Programming Concepts
2.1 ES2/EX2 Memory Map……………………………………………………………………….. 2-2
2.2 SS2 Memory Map…………………………………………………………………………….. 2-5
2.3 SA2 Memory Map…………………………………………………………………………….. 2-8
2.4 SX2 Memory Map…………………………………………………………………………….. 2-11
2.5 Status and Allocation of Latched Memory………………………………………………….. 2-14
2.6 PLC Bits, Nibbles, Bytes, Words, etc……………………………………………………….. 2-15
2.7 Binary, Octal, Decimal, BCD, Hex…………………………………………………………… 2-15
2.8 M Relay………………………………………………………………………………………… 2-17
2.9 S Relay………………………………………………………………………………………… 2-30
2.10 T (Timer) ……………………………………………………………………………………… 2-30
2.11 C (Counter) …………………………………………………………………………………… 2-31
2.12 High-speed Counters………………………………………………………………………… 2-34
2.13 Special Data Register………………………………………………………………………… 2-39
2.14 E, F Index Registers…………………………………………………………………..……… 2-51
2.15 Nest Level Pointer[N], Pointer[P], Interrupt Pointer [I] …………………..……………….. 2-51
2.16 Applications of Special M Relays and D Registers……………………...………………… 2-55
3 Instruction Set
3.1 Basic Instructions (without API numbers) ………………………..………………………… 3-2
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