I’m trying to understand “Scan Classes” in order to achieve the following :
I have many tags which I’m not really interested on, so my aim is to set their “Direct” scan class slow polling rate to 0 seconds.
I’d like to put all those tags in a transaction group, and force there the “read” option, so when I’ll set a trigger, all those tags (“at least in my plans”) got forced to be read from the opc server, and then executing the transaction group.
When I started working on this, I noticed that when I was setting an amount of seconds higher than 5 to the “Direct” scan class, it would not be considered, and it would eventually poll value at 5 sec.
Looking everywhere to understand what I was doing wrong, I saw the same behavior in the Inductive University Video at the 0:50 time mark :
He is setting the polling rate at 30000 ms, but after 5 sec the values are getting updated.
I’d Like to understand what I’m doing wrong, and if I set a 0 sec scan class, if I can then force a poll from the transaction group options.