Schneider Electric Processor Adapter manual DX Loadable Support

Ladder Logic Elements and Instructions

DX Loadable Support

Introduction	The M1 CPUs can use DX loadable instructions, which support optional software
	products that can be purchased for special applications. DX loadables provide the
	user with special ladder logic functions.
Loaded on
	The code for DX loadables gets loaded into the Page 0 area. Thus, for every word
Page 0	of DX loadable that is loaded, one word of Page 0 becomes unavailable for other
	use (such as application logic).
Limited
	DX loadables are limited in the functionality they can provide because they do not
Functionality	provide storage for variables and are limited in their size.
M1 Support
	M1 supports only loadables targeted for 80x86 microprocessors running in 16-bit
	real mode that have not made any hard-coded hardware assumptions (e.g., the
	address and format of the TOD clock). Obviously, there must be enough available
	memory to fit the loadable.
Saved to Flash
	Since DX loadables are stored in Page 0 memory, they are saved whenever a
	save-to-Flash operation is initiated.

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