Chapter 3 Instruction Tables Other instructions 3.4 Lists of Applied Instructions 3.4.1 Applied Instructions Comparison instructions 3-9 Instruction Execution Symbol Function Operand code condition PLF Falling-edge output DY, X, Y, M, S, T, C, HC, D, L, SM, and PR Instruction Symbol Function Operand code INV Inverting the logical operation result – NOP – No operation – PSTOP Stopping executing the PLC program – NP The circuit is rising edge-triggered. – PN The circuit is falling edge-triggered. – FB NP _ The circuit is rising edge-triggered. S FB PN _ The circuit is falling edge-triggered.
S Instruction code Pulse API Symbol Function 16-bit 32-bit Instruction 0000 LD= DLD= – Comparing the values ON: S ＝S 1 2 OFF: S ≠S 1 2 0001 LD DLD – Comparing the values ON: S ≠S 1 2 OFF: S ＝S 1 2 0002 LD> DLD> – Comparing the values ON: S ＞S 1 2 OFF: S ≦S 1 2 0003 LD>= DLD>= – Comparing the values ON: S ≧S 1 2 OFF: S ＜S 1 2 0004 LD DLD – Comparing the values ON: S ＜S 1 2 OFF: S ≧S 1 2