Hello mates,
ive been suffering some kind of error, if thats the case, in some of my tags. im using two datatypes affecting 8 retorts, the thing is a few days ago only one of the retorts started having some comunication problems with only a few tags and not all the time. the problem can last from seconds to couple of minutes and it affect the functionality but the comunication cut doesnt seem to affect the chart of the tags. there is no log input or error msg…just null value and thats it. there are some pics and thanks for the help in advance.
during the error the same tags in other datatypes arent affected and this has been working for about a year with no similar problem.
not at all,the only one allowed is on holidays jeje. i have also detected that there are “two groups” of tag in the error secuence. sometimes one group, sometimes another and even both groups.
1-sorry im not used to that term, ill ask tomorrow to the plc programmer but the plc is allen bradley SLC-5/05
2-default (1/s)
3- the tags from “LOADED_RECIPE” have been added and working for almost a year and the tags from “VALVLES” have been added and working for about 4-6 months
4-only read that im aware (im not the only one working in the system and the script is older than my experience, it hasnt been changed)
thanks for the help by the way, im fairly new to this and this isnt even my language (is harder to explain than i tought)
What firmware of the 5/05 is this? Some of the earlier version had issues with 10/100 connections and to fix things you had to specify 10mbps rather then auto. We had issues with that on other SCADA systems.
We were having a similar issue, just a different PLC, it turned out to be an issue with the network, one of the IT switches was having a hard time keeping up with the traffic.
