Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 35)

3–5 Overview of Decoder Operations
Publication 2755-833
Host Computers
The decoder connects directly to other host computers using the
RS-232 or RS-422 interface of the host device, or can be
multi-dropped (with DH485) through a 1784-KR module.
2755–DD1A/4A
Decoder
The Series B decoder has two types of memory:
•
operating memory
•
storage memory.
Figure 3.2 shows the relationship of the types of memory, and the
text that follows summarizes their contents.
Figure 3.2 Memory Areas of Decoder
Operating Memory
Storage Memory
Factory
Defaults
User Interface
AUX Terminal
Host Commands
Decoder
Performance or
Operation
SAVE
RECALL/RESTART & STARTUP
(Following loss of memory
backup)
DEFAULT
Types of Memory