Rockwell Automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User Manual - Manual (Page 29)

Chapter 2
Installing the Control Coprocessor
2-11
Relay Contact Output Modules Product Data, publication 1771-2.181, for
more information.
The control coprocessor performs the following functions at power up:
bootstrap routine
OS-9 initialization
A-B initialization (if direct-connect)
invokes either a user start-up program or the OS-9 shell
(command interpreter)
hardware initialization (RAM disk, OS-9 clock, serial ports)
fault-relay energizing
You will get the following normal indications on the main module after
power up:
CPU LED blinks green four times and then remains lit green
BATT LED blinks red four times and then is not lit (this indicates a
properly charged battery)
You will get the following normal indication on the optional serial
expander module after power up: the four character positions on the
ASCII display blink four times and then are not lit.
When removing a main module in direct-connect or standalone mode, first
verify that power is off to the 1771 I/O chassis; then, remove the module
by reversing the installation procedure. If in direct-connect mode, remove
the module from the PLC-5 programmable controller.
When removing a serial expander module, first verify that power is off to
the 1771 I/O chassis; then, release the locking tab and remove the module
from the I/O chassis.
After you complete the installation and powerup of the control
coprocessor, proceed to Chapter 3. Chapter 3 instructs you on how
to connect a programming terminal to the control coprocessor and
establish communication.
Apply Power to the
Control Coprocessor
Remove the Control
Coprocessor
What to Do Next