PLCs: Triconex internal variable retentiveness

[The AList]

==> Automation List post by JR...
To view or reply to this thread: http://www.control.com/thread/1228170779


------------------------------------------------------------------------------------
PLCs:  Triconex internal variable retentiveness
------------------------------------------------------------------------------------
It seems that Triconex TMR PLCs will lose the values of internal variables not only if power is cycled, but also if the CPU is stopped.  The 16MB of the 3008 CPU is not battery backed, only the 6MB of Flash memory.  Granted, TMR CPUs, redundant power supplies, etc. the probability is low.  The real concern is losing arrays of data developed during operation if the CPU is stopped and restarted.  We have a constraint where we can't have a connection to a PC to act as a server to reload the arrays like might be obvious.  Anyone have Triconex experience and would like to lend 2 cents?  Thanks.
------------------------------------------------------------------------------------


==> A Note from the Sender of this Message...
You are receiving this message because a subscription was entered for your address
for the Control.com Automation List.  To unsubscribe, send an email to us at 
forum at control.com requesting your removal from the subscription list.

This email was sent by: 
Control.com, Control Technology Corporation,
25 South Street, Hopkinton, MA, 01748, USA.

Copyright 2008 Control Technology Corporation. All rights reserved. 
Privacy and Legal Notices may be viewed at:
http://www.control.com/about.php