Awesome

PLCinject

Compiling

As easy as

$ make

Usually this is enough. Then you can find the binary in the current dir.

Troubleshooting

This tool depends on the Snap7 library available at http://sourceforge.net/projects/snap7/.

Compilation error

We include the libraries of the latest release (1.4.0) and use the Linux x86_64 version for compiling. If you need a different version, you'll have to pick it from the snap7/release/ dir and copy it to lib/. If that won't work, you'll have to get the full release of Snap7, compile it yourself and copy the library to lib/.

cannot open shared object file

PLCinject is dynamically linked with the Snap7's shared library in lib/. If you (re)move the binary or the library, it won't work.

Usage

The directory given by parameter -f must only contain the blocks to download to the plc. The filename convention is <blocktype>_<blocknumber>.mc7 (e.g. "FC_1000.mc7")

usage: plcinject -c ip [-r rack=0] [-s slot=2] [-b block] [-p block] [-f dir] [-d]

-d      Display available blocks on PLC
-p      Block that has to be injected/patched with a call instruction:  OBx, FBx or FCx on PLC, e.g. OB1
-b      Block to call
-f      Path to your block(s) you want to download to the plc

Example:

plcinject -c 10.0.0.1 -p OB1 -b FC1000 -f /home/user/PATH

This example will upload OB1 from the PLC at 10.0.0.1, inject this OB1 with a call instruction to the function block FC1000 which is located at /home/user/PATH and then downloads all blocks in /home/user/PATH and the modified OB1 back to the PLC.