Hello,
WinCC Flexible can be used for a smaller stand-alone SCADA system, with limited functionallities. It can monitor variables, you can have screens and scripts. However the data export and connectivity options are definitely not like WinCC. It also has less options and can handle few tags.
If you need scripts, extensive reporting or connectivity go with WinCC!
Best regards,
Danielle
Danielle Crespo Cavalcanti
Simatec Tecnologia em Automação
Belo Horizonte - MG - Brazil
www.simatec.com.br