Mitsubishi Electronics FX1S manual And, And Inverse, Peripheral limitations

FX Series Programmable Controllers Basic Program Instructions 2

2.6And, And Inverse

FX1S FX1N FX2N FX2NC

Mnemonic	Function	Format	Devices	Program steps
AND	Serial connection
	of NO (normally		X, Y, M, S, T, C	1
(AND)
	open) contacts
ANI	Serial connection
	of NC (normally		X, Y, M, S, T, C	1
(AND Inverse)
	closed) contacts

Program example:

	AND
X2	X0	0	LD	X	2
	Y3	1	AND	X	0
		2	OUT	Y	3
Y3	X3	3	LD	Y	3
	M101	4	ANI	X	3
		5	OUT	M 101
	T1	6	AND	T	1
ANI		7	OUT	Y	4
	Y4
	AND

Basic points to remember:

-Use the AND and ANI instructions for serial connection of contacts. As many contacts as required can be connected in series (see following point headed “Peripheral limitations”).

-The output processing to a coil, through a contact, after writing the initial OUT instruction is called a “follow-on” output (for an example see the program above; OUT Y4). Follow- on outputs are permitted repeatedly as long as the output order is correct.

Peripheral limitations:

• The PLC has no limit to the number of contacts connected in series or in parallel. However, some programming panels, screens and printers will not be able to display or print the program if it exceeds the limit of the hardware. It is preferable for each line or rung of ladder program to contain up to a maximum of 10 contacts and 1 coil. Also, keep the number of follow-on outputs to a maximum of 24.

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