Posted 26 Apr 2019 Hello everyone we have plc simatic s5 115u cpu944b and analoge output6es5 466_3la11, suddenly the outputs come to zero we close the machine and open many times.then the outputs come again. is anyone have any idea about this problem please Regards Share this post Link to post Share on other sites
Posted 27 Apr 2019 (edited) 12 hours ago, Must@@@@ said: Hello everyone we have plc simatic s5 115u cpu944b and analoge output6es5 466_3la11, suddenly the outputs come to zero we close the machine and open many times.then the outputs come again. is anyone have any idea about this problem please Regards Seeing as an analog output is driven by software; perhaps this is a programming error or problem with the machine. Have you measured your output voltage/ current at the card during time of issue to determine if the problem is indeed at the PLC end or in the field somewhere (such as a momentary cable break). Without further investigation or analysis; it is very hard to detrrmine the root cause of your problem. Regards Daniel Edited 27 Apr 2019 by collinsd70 1 person likes this Share this post Link to post Share on other sites
Posted 30 Apr 2019 Hello Mr Collin i use many inputs to analoge inputs 6ES5 466_3la11, now when the machine was running or stopping, all the inputs to the analoge inputs unit ok. now for porgram the values is ok when no problem, but when the problem happened the inputs not ok inside porgram, but if you test by tester the inputs ok Now in the picture inside Fb1 mw102 the value 5fb is ok when no problem.but when we faced problem the value disappeared.. Share this post Link to post Share on other sites
Posted 30 Apr 2019 I want to know if the problem from analoge inputs unit .if ok What is expected or is the reason for considering that the unit works after the main cutter and restart it several times Share this post Link to post Share on other sites
Posted 30 Apr 2019 6 hours ago, Must@@@@ said: I want to know if the problem from analoge inputs unit .if ok What is expected or is the reason for considering that the unit works after the main cutter and restart it several times I do not know the S5 Series well- however a few ideas that come to mind. 1. Are you reading your input from the Peripheral Input (PI) rather than the Process Image? 2. If you are reading the input voltage correctly- maybe there is an overflow in the PLC? or the analogue to digital conversion is faulty. Regards Daniel 1 person likes this Share this post Link to post Share on other sites
Posted 1 May 2019 I THINK the analoge to digital conversion is Faulty,and this model is very old,and there is difficult to find one. Regards Share this post Link to post Share on other sites