10 - 8 10 - 8
MELSEC-Q
10 DEVICES
10.2.2 Outputs (Y)
(1) Definition
(a) Outputs give out the program control results to the external devices such as
solenoid, electromagnetic switch, signal lamp and digital display.
Output (Y)
Sequence
operation
Signal lamp
Digital display
Contact
(b) Outputs give out the result equivalent to one N/O contact.
(c) There are no restrictions on the number of output Yn N/O contacts and N/C
contacts used in a program, provided the program capacity is not
exceeded.
M51
Load
Programmable
controller
No restrictions on the quantity used.
Program
Out ladder (external device)
Y22
Y21
Y20
Y20
X0
X1
Y20
Y20
X3
X2
Figure 10.4 Output(Y)
(2) Using outputs as internal relays (M)
"Y" corresponding to the slots installed with input modules and empty slots can
serve as internal relays (M).
P
o
wer su
pp
ly
m
odu
le
OUT Yn
Equivalent to internal relay
CP
U m
odul
e
Input
m
odul
e
Input
m
odul
e
Out
p
u
t m
odul
e
Out
p
u
t m
odul
e
Out
p
u
t m
odul
e