User guide

Hardware
890 USE 108 00 August 2001 13
The following figure shows the 984 PLC architecture.
Programming The Compact Controllers may be configured, I/O Mapped, and programmed with the
following software:
Concept panel software
Full-feature Modsoft panel software
Modsoft Lite depending upon the model
ProWORX software
Refer to Software Support, p. 49 for more information.
984 Controller
CPU EXEC ROM
RAM Memory
State RAM User Logic
Discrete Outs Ladder Logic
Discrete Ins
Register Ins Networks &
Register Outs Segments
from
Application
Sensing
Devices
Input
Modules
Output
Modules
I/O Processor
Communications Processor
Peripheral Other Nodes
(Host) Devices on a Network
to
Application
Switching
Devices