10
DEVICE EXPLANATION
10.2 Internal User Devices
10.2.2 Output (Y)
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10.2.2 Output (Y)
(1) Definition
Outputs give out the program control results to the external devices such as solenoid,
electromagnetic switch, signal lamp and digital display.
Outputs give out the result equivalent to one N/O contact.
(2) Number of used N/O and N/C contacts
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.
(3) Using outputs as internal relays (M)
Output (Y) corresponding to the slots installed with input modules and empty slots can
serve as internal relays (M).
Figure 10.6 Output from CPU module to external devices
Figure 10.7 Use of output (Y) in program
Figure 10.8 Substitute for internal relay
Signal lamp
Digital display
Contact
Output (Y)
Sequence
operation
M51
Y22
Y21
Y20
Y20
X0
X1
Y20
Y20
X3
X2
No restrictions on the quantity used.
Out ladder (external device)
Program
Load
Programmable
logic controller
Programmable
controller
Input module
OUT Yn
Equivalent to
internal relay
