bara_hence
Member
I am working on a complex process cell or what to call it.. It works like a line with a continuos flow where you fill molds with product and it goes through tempering zones and so on..
The thing I now want some advice on is the logic for start,stop,paus,BacktoBack recipe change and so on..
Me myself whas thinking of doing this with states.. First I have six states wich are really modes for the machine - Stopping-Stopped ShuttingDown-Shutdown Standbying-Standby the difference between these states is temp setpoints (Standby-Stopped) and the shutdown state means nothing is running. From the standby state one should be able to start the machinery (doh) and then we go to the starting state here we start all the equipment in an orderly fashion and when thats done we enter the production state.. From the production state the operator can choose to start the fill machines either one by one or all at once.. I was thinking of having some bit resetted or setted here.. When making product you have several stop situations 1. Production paus may be initiaded by some downstream condition and if this is the case the line should restart after this condition goes away. Therefore i have a restart state. Production stop, Controlled Stop i have them gathered in a contr.stopping state and i have a back to back state for product change and so on....
I can post a picture later it gets much more clearer then...
I have never done this type of machine and the question i have is there an easier way for me it seems it is getting really complex in the end..
Any words from you experts how do you design a "machine" like this??
The thing I now want some advice on is the logic for start,stop,paus,BacktoBack recipe change and so on..
Me myself whas thinking of doing this with states.. First I have six states wich are really modes for the machine - Stopping-Stopped ShuttingDown-Shutdown Standbying-Standby the difference between these states is temp setpoints (Standby-Stopped) and the shutdown state means nothing is running. From the standby state one should be able to start the machinery (doh) and then we go to the starting state here we start all the equipment in an orderly fashion and when thats done we enter the production state.. From the production state the operator can choose to start the fill machines either one by one or all at once.. I was thinking of having some bit resetted or setted here.. When making product you have several stop situations 1. Production paus may be initiaded by some downstream condition and if this is the case the line should restart after this condition goes away. Therefore i have a restart state. Production stop, Controlled Stop i have them gathered in a contr.stopping state and i have a back to back state for product change and so on....
I can post a picture later it gets much more clearer then...
I have never done this type of machine and the question i have is there an easier way for me it seems it is getting really complex in the end..
Any words from you experts how do you design a "machine" like this??