Siemens typically distributes RCS802 as part of the standard delivery package for the SINUMERIK 802D sl. Standard Delivery
If you do not have credentials, do not use a generic "guest download" from mirror sites. Instead, contact Siemens Technical Support directly at +1-800-333-7421 (US) or your local branch. Request a "Legacy software drop link" for RCS 802. Provide your hardware serial number (MLFB) to verify ownership.
: Assists in the initial setup and commissioning of the SINUMERIK 802D sl system, even without a license.