EVERY PLC ENGINEER NOT TO DO THE FIVE RULES?

 PLC PROGRAMMERS STRUGGULE WHILR CREATE THE PROGRAM. IF DO NOT FOLLOW THE RULES HAS BELOWS

5 COMMON FAULTS  AUTOMATION ENGINEER

01 DO NOT REVIEW THE MANUAL

Sometimes it happens to us that because we have automated and because we think that we have already done several projects, we believe that we are not going to make a mistake. A fatal mistake!  Remember that it is important to review the characteristics of each equipment, because some configurations and connections are different. 

 

02 ALMOST NEVER THE PROBLEM IS THE PLC PROGRAMMING

I highlight the "ALMOST".  It has happened to me that at the time of a plant failure, the operators or maintenance personnel attribute the failure to the PLC.  However, in most cases, it is failures in a connection of some input, in the sensors, in the jump of an alarm of another input, the most probable.

03 DO NOT INITIALIZE THE VARIABLES 

 This happens a lot when one is just starting and learning.  Many times it happens, when programming sequences, one forgets to lock an initial variable that starts (forgive the redundancy) certain processes.  It may happen that when starting, go straight ahead and a signal is activated.  You have to be careful .

 

 

 04 FORGET TO ANCHOR CONTROL TIES

 Imagine that you have a fuller pump fed by another process, but what happens if the pump stops for some reason?  Well, the part that feeds the fuller pump should stop too.  If the opposite happens, if the part that feeds the pump continues to operate, the control loop is failing. 

 

 

05 DO NOT CONSIDER THE MANUAL OPTION

 - AUTOMATIC MANUAL Does the PLC never fail?  If for some reason, water falls on it or for another reason causes the PLC to break down, the automatic stops working, but the plant should never stop.  That is why it is very important to consider the manual option, which is normally to run the electrical part, without the PLC.