Specifications

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1768-SG001A-EN-P -- March 2006
CompactLogix Selection Guide
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The 1768 CompactLogix controller is the rightmost module in the 1768 backplane. In
addition to the controller, you can have a maximum of two 1768 modules. These modules
can be combination of:
y two 1768 ENBT EtherNet/IP modules, or
y one 1768 ENBT EtherNet/IP module and one 1768-M04SE SERCOS
interface module.
The 1768 system supports a maximum of only one 1768-M04SE SERCOS
interface module.
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The following equations provide an estimate of the memory needed for a controller.
When estimating memory use by communication modules, count all the communication modules in the system, not just those
in the local chassis. This includes device connection modules, adapter modules, and ports on PanelView terminals.
Controller tasks _____ * 4000 =
_____ bytes
(minimum 1 task)
Digital I/O points _____ * 400 = _____ bytes
Analog I/O points _____ * 2600 = _____ bytes
Communication modules _____ * 2000 = _____ bytes
Motion axes _____ * 8000 = _____ bytes
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The 1784-CF64 card offers nonvolatile memory (flash) to permanently store a user
program and tag data on a controller. You can:
y manually trigger the controller to save to or load from nonvolatile memory.
y configure the controller to load from nonvolatile memory when you cycle power.
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The 1768 controller does not require a battery. The controller uses internal flash memory
to store its program during shutdown. Energy stored in the 1768 power supply maintains
controller power long enough to store the program to internal flash memory (not the
external CompactFlash card).