Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual page 344

■Long timer (LT/LST)
In the following program, the accuracy of Tp (the time duration from the long timer coil activation to long timer contact
activation) is (Ts-Tu)  Tp < (Ts + Tu).
M0
LT0
LT0
M1
M0
LT0 (coil)
LT0 (contact)
M1
LT0 coil
Execution of
(OUT LT0 instruction)
M1 coil
Execution of
(OUT M1 instruction)
Counter used in system
(Ct)
Previous count value
of LT0 (Cp)
Current value of LT0
(1) Cp is updated.
(2) LT0 is initialized to 0.
(3) The result of (Ct - Cp) is added.: 0 + (12 - 10) = 2
(4) The result of (Ct - Cp) is added.: 2 + (13 - 12) = 3
(5) The result of (Ct - Cp) is added.: 3 + (15 - 13) = 5
Tp: time duration from the long timer coil activation to long timer contact activation
Ts: setting value of the long timer
Tu: time limit value of the long timer
21 DEVICES
342
21.3 User Device
K5
Process value of LT0 (Tp)
ON
ON
10 11 12 13
(1)
10 12
0 2
(2) (3)
ON
ON
14 15 16 17
(1) (1)
13 15
3 5
(4) (5)