How to use Initialization program (COLD & HOT Start)
2014.07.01

Q: How to use Initialization program (COLD and HOT Start) 

  

A: It is used to initialize data and parameter before getting started on scan program again. 

 

 

 

[COLD] 

 

PLC runs Initialization program once when CPU is turned to RUN mode or power ON. 

It makes all data value “0” except latch memory and initialize other data or device. 

  

[HOT] 

 

 

PLC runs Initialization program once if CPU is turned to RUN mode or power ON out of designed time period. It maintains data value and runs scan program after Initialization program. 

In order to use Initialization program (HOT), you have to select “Enable” Hot Restart at PLC Parameter as below picture. 

  

 

  

 

Hot Restart   

If black out occurs when PLC is running, Hot Restart recovers all PLC data and parameter status before black out. Therefore, PLC achieves continuity of program running. 

  

In order to finish Initialization program, you have to use “INITEND” instruction as below. 

     

 

See attached manual for more details.