Supported types of memory areas

The default initial values are 0 or FALSE.

Availability of memory areas:

The FP series PLCs have many different memory areas, which support 1-bit, 16-bit, or 32-bit addressing. Availability of the memory areas varies, depending on the PLC's processor. Addresses may be specified in FP format (e.g. X) or IEC format (%IX).

Memory area	1-bit	16-bit	32-bit	64-bit	16-bit PLCs	32-bit PLCs
Input	X	WX	DWX		●
Input				LWX²⁾		●
Output	Y	WY	DWY		●
Output				LWY²⁾		●
Internal flag	R	WR	DWR		●
Internal flag				LWR²⁾		●
Timer flag	T				●	●¹⁾
Timer set value register		SV			●
Timer set value register			TSV			●¹⁾
Timer elapsed value register		EV			●
Timer elapsed value register			TEV			●¹⁾
Counter flag	C				●	●¹⁾
Counter set value register		SV			●
Counter set value register			CSV			●¹⁾
Counter elapsed value register		EV			●
Counter elapsed value register			CEV			●
Data register		DT	DDT		●	●
Data register				LDT²⁾		●
File register		FL	DFL		●
Link flag	L	WL	DWL		●	●
Link flag				LWL²⁾		●
Link register		LD	DLD		●	●
Link register				LLD²⁾		●
System flag	SR	WSR	DWS			●
System data		SD				●
System data			DSD
Unit memory		Sx:UM	Sx:DUM			●
Index register		IX			●
Index register			DIX			●
Error alarm flag	E				●	●
Pulse flag	P				●

¹⁾On the FP7, these addresses are reserved for the system.

²⁾Supported for data type LREAL on 32-bit PLCs only.