YoungWint
Member
Wondered if there were any thoughts on this.
I am developing a project and with alot of package plant on an ethernet ring (S7-300). My original plan was to read data from each PLC and let them read my system and thus use the 'Put' function block.
Against my better judgement one of the packages requires some commands from my system.....I have a nice routine for the reading which polls each PLC in turn, thus reading one at a time.
What I realize is that the commands may have to be sent instantly and during a write the read may have to be stopped.
Does anyone have any advise, tips etc.
I am developing a project and with alot of package plant on an ethernet ring (S7-300). My original plan was to read data from each PLC and let them read my system and thus use the 'Put' function block.
Against my better judgement one of the packages requires some commands from my system.....I have a nice routine for the reading which polls each PLC in turn, thus reading one at a time.
What I realize is that the commands may have to be sent instantly and during a write the read may have to be stopped.
Does anyone have any advise, tips etc.