S7 Data logging

Hey, first post here.
I'm attempting to monitor a datablock within a siemens plcs, most likely a 313C but not yet decided, does there happen to be some sort of software to monitor/log the data?
It's to monitor and log down time of a machine and the reason for downtime.

Hello,

PeakHMI can monitor and log the data of an S7-3XX.

We have a trail version installer on our website so you can verify it will work for you. There is also a demo project for an S7 using MPI and one for Ethernet.