Notations¶

PLCYard is one PLC, and you choose how it is written in Tools → Options → Notation. The program is the same in both: switch at any time, and read either style of documentation or manual.

	Mnemonics	IEC symbols
Contacts and coils	XIC, XIO, OTE, OTL, OTU	NO, NC, coil, S, R
Boxes	MOV, EQU, LIM, JSR	MOVE, CMP ==, IN_RANGE, CALL
I/O	Local:1:I.Data.0, Local:2:O.Data.3	%I0.0, %Q0.3
Analog I/O	Local:7:I.Ch0Data	%IW64
Timer members	.PRE .ACC .DN .EN .TT	.PT .ET .Q .IN
Counter members	.PRE .ACC .DN	.PV .CV .Q
System bits	S:FS, S:V	FirstScan, Overflow

Both spellings are accepted when you type an operand, whichever notation is shown. Files store the canonical form (%I0.0, .PRE), so a project opens the same for everyone.

The full list of mnemonics and their IEC names is in the instruction reference.