The TF2400 TwinCAT 3 HMI Audit Trail extension enables changes to the HMI operator and system events that have occurred to be securely recorded so that they can be traced chronologically. The entries are stored in a database and can be generated as a PDF report or exported in different formats (JSON, HTML, CSV). Electronic signatures allow a user to be reauthenticated with higher privileges. This product enables applications to be developed according to the provisions of FDA 21 CFR part 11, GAMP and GMP. In addition to generating PDF reports and electronic signatures, TF2400 also includes 250 audit trail symbols, which can be expanded using the TF24x0 TwinCAT 3 HMI Audit Trail Symbols Pack.