ProSoft Technology ProLinx S3964R User Manual Page 119

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Publication LOGIX-AP010B-EN-P - May 2010 119
Chapter
8
Logix Replacements for S5 Components
Introduction
This chapter lists S5 components and provides information for selecting
suitable Logix replacements.
It is not possible to give a definitive table specifying which Logix controller
should replace each S5 controller. The best replacement will be determined
only after analyzing the requirements of each particular application.
For example, a stand-alone CPU 943 controller may be replaced by a Logix
1756-L62 controller. If several S5 CPU 943s are being used to control plant
areas and they are communicating over a serial interface, it may be advisable to
replace all these controllers with a Logix CPU such as a 1756-L62, 1756-L63,
or 1756-L64.
The defining criterion for selecting the most suitable model of controller for a
particular application is usually memory capacity. Guidance on the amount of
memory needed to implement an application for Logix and S5 controllers is
provided in Chapter 1.
Controller Memory Use
This section covers the various Logix module types available for replacing S5
components and their advantages.
CPU Modules
The following table suggests which Logix controllers may be suitable
replacements for S5 controllers based on the principle of replacing low end
capacity S5 controllers with the lowest end capacity Logix controllers, medium
level S5 controllers with medium level Logix controllers and high end capacity
S5 controllers with high end capacity Logix controllers.
If replacing an S5-90U or S5-95U controller, consider one of the Logix
CompactLogix range of controllers. There are three controllers in the 1769
CompactLogix family.
1769-L31 – 512 KB Memory and maximum 4 tasks
1769-L32 – 700 KB Memory and maximum 6 tasks
1769-L35 – 1.5 MB Memory and maximum 8 tasks
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