Version history

Fixed: Data exchange with Plcsim doesn’t hang up any more, when packets of some special PDU sized occur
Check of the running IEPG-Helper servicename to stop/start service in Windows 32 or 64 Bit OS
Added Command-line Arguments, and the possibility to Drag&Drop a configuration file on the NetToPLCsim.exe

Temporary fix: Implemented own response for SZL-ID 0x0131 index 3 request, to force clients not to use the cyclic data exchange mechanism, which causes sometimes communication failures
Usability: Automatic name generation when a new station is added

NetToPLCsim answers a client that only one single request at time can be handled (MaxAmQCalling/MaxAmQCalled)
Added optional setting for rack/slot combination of CPU (maybe possible to connect to TIAPortal Plcsim)
Added option for TSAP check corresponding to entered rack/slot. Connection ressources 1, 2 or 3 are valid (1=PG, 2=OP, 3=S7basic)
Protocol monitor: requested index and ID of SZL requests are shown

Adding Tool "Get Port 102" in Menu Tools, which helps to get NetToPLCsim working under Step 7 V5.5 SP2 and Windows 64 Bit

Redesign of handling the S7online interface. NetToPLCsim supports now the full functionality of Plcsim. Programming functions like up- and downloading of program blocks and online diagnostics are possible. Also block-specific messages like ALARM_S, ALARM_8 and cyclic variable services are supported.
Added own response telegram to SZL-ID 16#0x74, used to get the LED state of the CPU. Independent of the operating mode, the response is always RUN-LED on, and all other LEDs off.

Fixed: if many ISO packets were sent in a single TCP telegram, this may have caused an exception and disconnect (for V.1.0.0)
Added support to S7-Plcsim for TIA-Portal S7-1200/1500
Function "Get Port 102" from tools-menu is now executed on program start to stop the Siemens service
Monitor window: With mouseclick on statusbar the capturing can be paused and resumed
New documentation using Windows-Help files
Changed license from GPL to LPGL

Fixed: Handling of the station-name used in the function to browse the reachable Plcsim partners. Fixes the problem that sometimes no Plc was found, or an exception occured.
Increased the timeout to stop the S7DOS service and added an optional second try, to prevent that a timeout occurs on slow machines.

Fixed: Reading multiple TPDUs from TCP-stream corrected. Data from client applications which used to send more than one unacked PDU are now processed without problems.
Protocol monitor: show requested variables in cyclic variable services

Fixed: Received ISO packets with a length less than 5 bytes were not transferred to Plcsim. This is possible in fragmented ISO packets.

Fixed: Fixed memory leak, which may lead to a crash of NetToPLCsim with "Out of memory".

Improvement: Take the negotiated TPDU size into account for all further packets.
User interface: Improved dialog to browse and show the available IP addresses of the network interfaces.

Fixed: Some Wi-Fi network interfaces are now displayed in the browse dialog. Added an option to show all available network interfaces.