We developed one project using CR3000 HMI and S71500 PLC. The programming platform was Crison 3.1 and TIA PORTAL. The communication between HMI and PLC are OK. The tag import in Crimson application was not working: need manual reconfiguration for every tag! The DB import are working very good. Our conclusion: Red Lion is not so friendly with Siemens PLC, but, if you develop your variables in DB (not in tags), you can work without problems!