How to Download Core and CSLOG's.

This article only refers to older models of NVR, such as; 

S models of NVR, QRN-410s, QRN-810s, QRN-1610s, XRN-410s, XRN-810s XRN-1610s, XRN-2010, XRN-3010 and PRN-4011

For newer NVR models, please see this article

In some cases Hanwha Techwin Technical Support may request for CS and CORE logs from recorders

To do this - 

Open a web browser and enter the following address in the address bar:

http://192.168.1.100/index.php/cslog

Replace the IP address above with that of your recorder

You will be prompted with the screen below, enter the admin user credentials and click on the requested button.
This screen may vary based on product

This will generate .dat file and prompt you to download

Figure 1 - Login Screen for log collection

Figure 2 - Generating logs after entering valid admin login credentials

Figure 3 - Export complete dialogue

Figure 4 - Browser download prompt