Basic Ladder Logic Instruction of a PLC

1. Bit Logic Instruction

• Normally Open (XIC)
• Normally Close (XIO)
• Positive Edge
• Negative Edge
• Output Energize (OTE)
• Output Latch (OTL)
• Output Unlatch (OTU)

2. Timer Logic Instruction

• Timer On Delay (TON)
• Timer Off Delay (TOF)
• Retentive Timer (RTO)

3. Counter Logic Instruction

• Count Up (CTU)
• Count Down (CTD)
• Count UP/Down (CTUD)

4. Comparison Logic Instruction

• Equal (EQU)
• Not Equal (NEQ)
• Greater Than (GRT)
• Greater Than or Equal (GEQ)
• Less Than (LES)
• Less Than or Equal (LEQ)
• Limit (LIM)

5. Arithmatic Logic Instruction

• Addition (ADD)
• Subtraction (SUB)
• Multiplication (MUL)
• Division (DIV)

6. Move Logic Instruction

• Move (MOV)
• Block Move (BKMV)
• Copy (COP)

Note :

✅ Various Types of Instruction Available In PLC.

✅ Other Instruction Use By Programmer as per Requirement.