Program explanation

Hello,

Can any one explain the attached program. I need explanation of how i can check and monitor call function.

 I think call environment command is not relevant in your case but my suggestion:

1-Find the FB that represents STAT187

2-Check the program if it is not protected

3-Find the Instance DB related to the main FB and monitor cells related to STAT187.

4-if the block is protected, try to write a simple program to simulate the functionality.

I hope it helps,

hdhosseini