Справочник Пользователя для Mitsubishi Electronics FX2NC

FX Series Programmable Controllers

2-6

Program example:

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.

AND
(AND)

Serial connection 
of NO (normally 
open) contacts

X, Y, M, S, T, C

1

ANI
(AND Inverse)

Serial connection 
of NC (normally 
closed) contacts

X, Y, M, S, T, C

1

FX

0(S)

FX

0N

FX FX

(2C)

FX

2N(C)

X
X
Y
Y
X
M
T
Y

X2

Y3

AND

X0

X3

T1

ANI

AND

2
0
3
3
3

101

1
4

LD
AND
OUT
LD
ANI

OUT

OUT
AND

0
1
2
3
4

6
7

5

Y3

M101

Y4

•

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.