Is there a way with Ignition to set up the scan classes to act like a polling driver?
Like several of you out there, we have many systems that use a PLC as a data concentrator to message other PLCs over serial and Ethernet radio and cellular networks. We use a PLC because we can control the timing of the polling to each site, rather than having the SCADA software maintaining a connection to the remote PLC and constantly sending/receiving data. This is critical in cellular networks to control the data usage. Connecting Ignition directly to a PLC over a cell modem really burns through the data.
I’d really like to get rid of the data concentrator PLC’s in our designs. Polling speed isn’t a critical factor.