The 4.7 version of SoftPLC is available as a free download on our website. The actual developer of the program is IBH softec GmbH. The software is categorized as System Utilities. The most popular versions among SoftPLC users are 4.7 and 4.0. The most frequent installation filenames for the program are: plc315.exe, plc416.exe and SoftPLC.exe etc.
From the developer:
The SoftPLC S7-315® / S7-416® executes a program in the same manner as a hardware PLC. The advantage of executing a PLC program this way is, that the PLC status can be displayed in real time without any recompile activities. Since the Soft PLC behaves like a original SIMATIC® PLC, the programming tools S7 for Windows® and STEP®7 can be used. Online connections can be established serial, via Ethernet, via PROFIBUS DP and directly on the same PC.
You may want to check out more software, such as Soft PLC ADV50, Optima PLC or STRATON T5 Runtime, which might be related to SoftPLC.