Can we use Vijeo Citect SCADA to communicate with Siemens S7-1200 PLC on Profinet protocol.
Vijeo Citect has no native driver for communication on Profinet protocol. But as a alternate solution you can use in the following way :
1) Native OPC Driver for VJC + WinCC as OPC Server
2) PSDirect Ethernet driver from VJC is a specialty driver that would let you access S7 PLC data over Ethernet (it is not Profinet) without any other hardware and software from Siemens. The Demo version of this driver can be found on installation DVD and stays online for 4 hours. For full version a separate driver license must be bought.