Instructions Supported in Ladder Diagram

The supported ladder diagram instructions are useful while importing the ladder into Simulink. The instructions can be categorised into two:

• Instructions that are implemented in Simulink^® using ladder diagram blocks with same name

• Instructions that are implemented in Simulink using other ladder diagram blocks.

The table lists the instructions that map to blocks in Simulink

L5X Instructions	Ladder Model Blocks
ADD	ADD Block
AFI	AFI Block
AND	AND Block
CLR	CLR Block
COP	COP Block
CTD	CTD Block
CTU	CTU Block
DIV	DIV Block
EQU	EQU Block
FBC	FBC Block
FLL	FLL Block
GEQ	GEQ Block
GRT	GRT Block
JMP	JMP Block
LBL	LBL Block
LEQ	LEQ Block
LES	LES Block
MCR	MCR Block
MOV	MOV Block
MUL	MUL Block
NCP	NCP Block
NEQ	NEQ Block
NOT	NOT Block
OR	OR Block
OTE	OTE Block
OTL	OTL Block
OTU	OTU Block
RES	RES Block
RTO	RTO Block
SUB	SUB Block
TND	TND Block
TOF	TOF Block
TON	TON Block
XIC	XIC Block
XIO	XIO Block

The special instructions that are implemented using another block in Simulink are:

• JSR instruction is implemented by using a Subroutine block.

• AOI call instruction is implemented by using an Inline AOI block