controlling a timed relay process and not using a sequence to do it

[dannyjhu]

I am using the fieldpoint system with the RYL-421 module and am trying to control a step by step timed process to open and close valves to automoate a chemical synthesis in our lab, (i.e. relay 1,2,3 (valves 1,2,3) on for 30 seconds followed by Relay 2, 3 off and relay 1, 4,5 on for 2 seconds, ect). I have written a several panel sequence that works, however I am interested building a new program without using a sequence so that I can scale the application to many more additional steps than the three I currently have. What method would be the best to go with?

Thank you for your help.

[Joe_H]

I would use a statemachine for this and with each different state set the state of the relays and the time. See the examples for a state machine type architecture.

if you have any more questions then do not hesitate to ask and I will try to help.