We were asked to replace the PLC's at a recycling plant The existing control system consisted of 3 PLC's running a shredding/recycling line with no HMI present.
Stoppages were happening often but without any HMI, the operators and maintenance were spending valuable time chasing wires inside the control cabinets trying to discover what caused the stoppage.
We installed an S7 1511 with ET200SP remote IO and a Comfort HMI on Profinet. The result was a user-friendly system with diagnostics and alarm history. Hand controls were also added which were not available before the upgrade.
