Rockwell Automation 57C423 Common Memory Module - Manual (Page 13)

3Ć1
3.0 INSTALLATION
This section describes how to install and remove the module and the
onĆboard battery. Note that removing or replacing the Common
Memory module may affect tasks and variables in the rack. Appendix
E illustrates how tasks and variables are affected in a DCS 5000 rack.
Appendix F illustrates how tasks and variables are affected in an
AutoMax rack.
DANGER
THE USER IS RESPONSIBLE FOR CONFORMING TO THE NATIONAL ELECTRIC
CODE AND ALL OTHER APPLICABLE CODES WITH RESPECT TO WIRING,
GROUNDING, DISCONNECTS, AND OVERCURRENT PROTECTION. FAILURE TO
OBSERVE THIS PRECAUTION COULD RESULT IN SEVERE BODILY INJURY OR
LOSS OF LIFE.
3.1 Initial Installation
Use the following procedure to install the module:
Step 1.
Turn off power to the rack and all connections.
Step 2. Take the module out of its shipping container. Take it out of
the antiĆstatic bag, being careful not to touch the
connectors on the back of the module.
Step 3. Activate the onĆboard battery. When viewing the Common
Memory module from the front, you can access the battery
through the opening in the right wall portion of the
protective enclosure. Activate the battery by taking it out of
its holder and removing the tape that covers it. Replace
the battery in its holder. Make certain that the battery is
facing in the proper direction, i.e., the end marked +" on
the battery is facing the end marked +" on the battery
holder. For maximum battery life, you should not remove
the tape from the battery unless you intend to turn power
on to the module immediately.
Step 4. Insert the module into the desired slot in the rack. Use a
screwdriver to secure the module into the slot. To enable
bus arbitration logic, the Common Memory module must
be placed in slot 0. For M/N 57C413B, the slot to the right
of the Common Memory module must contain either a
Processor module or be empty because the Common
Memory module takes up two slots of logical address
space. For M/N 57C423, the 3 slots to the right of the
module must contain either a Processor module or be
empty because the module takes up four slots of logical
address space when in slot 0. Refer to figure 3.1.
To serve as data storage, the module must be placed in an
even numbered slot (2,4,6,8,10,12,14). The slot to the right
of the Common Memory module must be empty because
the module (both 57C413B and 57C423)takes up two
slots of logical address space when used in this way.
Refer to figure 3.1.