Step 3. Using A "Empty.rss" Project - Control Techniques UD77 DeviceNet Startup Manual

Step 3. Using a "EMPTY.RSS" project

When a SLC 500 Rack is first assembled, with a new processor that just had the Battery
Backup connected, the processor powers up to a checksum fault.
One of the ways to clear this checksum fault condition is to configure communication from your
PC with RSLinx and download an "empty" project into the Processor with RSLogix500. Project
"EMPTY.RSS" is a RSLogix500 project that assumes only the Processor is plugged into the
SLC 500 Rack (Discrete I/O and 1747-SDN modules unplugged with power OFF).
For most Laptops and Desktop PC(s), a null-modem style cable, such as an serial "Interlink"
cable or a serial "Laplink" cable is required for establishing communication from the PC to the
processor. The cable that comes with the 1770-KFD DeviceNet Serial interface can also be
used. A simple 9-pin "D-shell" straight-through male-to-female RS-232 extension cable and a
gender-changer will not work. See the Appendix for the connection(s) to make an adapter for
use with this type of extension cable.
Configuring the RSLinx Driver "RS-232 DF1 Devices" to communicate from the configuration PC
into the SLC "DF-1 CH0" port (the default), loading a project from disk into RSLogix500, and
downloading that project into the SLC processor are covered in detail in the section "Using
RSLogix500 and Linx Lite" of this Start Up Guide.
Note: If the processor does not require re-initialization, (for example, the processor had already
had a previous program loaded into its memory) project "FIRST.RSS can be ignored.
Page 15 of 77