Appendix f – Rockwell Automation 57C423 Common Memory Module User Manual
Page 37
FĆ1
Appendix F
How Removing/Replacing The Common
Memory Module Affects Tasks and
Variables in an AutoMax Rack
The following tables illustrate how removing or replacing the Common Memory
module affects tasks and variables in an AutoMax rack. (Refer to Appendix E for
information regarding the effect on tasks and variables in a DCS 5000 rack.)In
each case, assume a BASIC task has written to variables in both the Processor
(local)and the Common Memory module (common). Also assume the task was
stopped before power was removed from the rack.
Common Memory Module Located In Slot 0
For the following, assume the Common Memory module is in slot 0 and a
Processor module is in slot 1.
Status of Data
Common
Action
App.
Task
Deleted?
App.
Task
Status
NonVol
Vol
Local
Replace 57C413A with
Same or new 57C413A
ąAt power up
YES*
N/A
N/A
N/A
N/A
Replace 57C413A with
New 57C413B or 57C423
ąAt power up
YES*
N/A
N/A
N/A
N/A
Replace 57C413B or
57C423 with new or used
57C413B or 57C423 (modĆ
ule may contain data from
another application)
ąAt power up
YES*
N/A
N/A
N/A
N/A
Replace battery on
57C413B or 57C423 and
return same module to
rack
ąAt power up**
NO
STOP
Data OK
Zero
Data OK
*
You must reĆload the configuration and application tasks onto the rack. This
procedure is described in the AutoMax Programming Executive instruction
manual. Refer JĆ3750 if you are using AutoMax Version 3.0 or later. Refer to
JĆ3684 if you are using AutoMax Version 2.1 or earlier.
** Assumes superĆcapacitor has maintained memory on the module during the
time required to replace the battery.