ContentsGFK-2737F December 2016 iii4.4 After the Configuration is Stored to the PROFINET Controller........................................... 49Chapter 5 Operations............................................................................................................................. 515.1 Power-up ...................................................................................................................................... 525.2 I/O Scanning ................................................................................................................................ 535.2.1 PROFINET Scanner Status and Control Data ......................................................................................................... 535.2.2 Data Coherency .................................................................................................................................................................... 545.2.3 Sampling Rate ........................................................................................................................................................................ 545.2.4 Differences from Main (CPU) Rack ............................................................................................................................... 545.2.5 Output Control ....................................................................................................................................................................... 555.3 Hot Swap of I/O Modules ........................................................................................................... 56Chapter 6 Diagnostics ........................................................................................................................... 576.1 Configuration Faults .................................................................................................................. 586.2 Version Information ................................................................................................................... 596.3 Fatal Error Handling ................................................................................................................... 606.4 Connection Troubleshooting .................................................................................................... 61Appendix A PROFINET Specifications .......................................................................................................... 63A-1 PROFINET Protocol Support ................................................................................................................... 63A-2 Technical Data .......................................................................................................................................... 63A-3 Limitations ................................................................................................................................................ 64A-3.1 PACSystems Features ........................................................................................................................................................ 64A-3.2 PROFINET Features .............................................................................................................................................................. 64