PLC Stop vs PLC Fault | Why S7-300 PLC Goes to STOP Without OB? | Urdu Class 5

Why does a Siemens S7-300 PLC go to STOP when a required OB is not present? And what happens when the correct OB is added? In this video, I explain the behavior of Siemens S7-300 PLC when a required Organization Block (OB) is missing. You will see the difference between a PLC going into STOP mode and a PLC remaining in RUN while only generating a system fault. You will also learn how to write ladder logic program in different PLC OBs. Which will execute only when that specific OB is Called. In this practical PLC lesson, you will understand: ✅ What happens when the required OB is not added ✅ Why the S7-300 PLC can go into STOP ✅ What happens after adding the proper OB ✅ Difference between PLC STOP and PLC Fault ✅ How OBs handle specific CPU/system faults ✅ Why the PLC can remain in RUN after handling a fault ✅ Practical S7-300 PLC example 00:00 Siemens S7 300 PLC Organization blocks (OBs) 00:25 Why add Organization blocks (OBs) in PLC 01:00 Step 7 PLC Simulator PLCSIM 04:15 S7-300 PLC STOP 05:05 Add Programming Error OB121 in 300 PLC 05:40 S7-300 PLC SYSTEM FAULT 03:25 Siemens S7 PLC Range Module 12:35 Add Diagnostic Interrupt OB82 in 300 PLC 14:20 Siemens 300 PLC with WinCC HMI 15:47 Siemens WinCC Configuration 16:50 Step 7 PLC Hardware Configuration This video is useful for anyone learning Siemens S7-300 PLC programming, Organization Blocks (OB), CPU diagnostics, PLC faults, and PLC troubleshooting. If you are learning PLC programming step by step, follow the complete PLC learning series on this channel. #PLC #S7300 #SiemensPLC #PLCProgramming #PLCOb #PLCTraining #PLCFault #PLCSTOP #IndustrialAutomation #Siemens 🟢📱 💬 WhatsApp: +92 3346580776 Subscribe Field To Panel and join me on this journey to master PLC programming and industrial automation.