MELSEC System Q Beginners Manual 4 – 47
An Introduction to Programming Programming PLC Applications
Name Function Adress Remarks
S0 STOP button X0 Break contact (Normally closed, NC)
S1
OPEN key-operated switch
(outside)
X1
Make contacts (Normally open, NO)
S2 OPEN button (inside) X2
S3 Upper limit switch (gate open) X3 Break contact (NC)
S4 CLOSE button (inside) X4
Make contacts (NO)
S5 CLOSE button (outside) X5
S6 Lower limit switch (gate closed) X6 Break contact (NC)
S7 Photoelectric barrier X7 X7 is set to “1” when an obstacle is registered
H1 Warning lamp Y10 —
K1 Motor contactor (motor reverse) Y11 Reverse = OPEN gate
K2 Motor contactor (motor forward) Y12 Forward = CLOSE gate
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