Mitsubishi MELSEC System Q User Manual

Timers of the MELSEC System Q PLC-CPUs
*
Initial values, the number of timers can be set in the PLC parameters.
5–8 MITSUBISHI ELECTRIC
Timers Devices in Detail
Device
Timer types
Normal Timer Retentive Timer
Device identifier T ST
Device type (for setting and polling) Bit device
Possible values (timer output) 0 or 1
Device address format Decimal
Timer setpoint value entry
As a decimal integer constant. The setpoint can be set either directly
in the instruction or indirectly in a data register.
Number of devices and
addresses
Q00J
512 (T0 to T511)* 0*Q00
Q01
Q02
2048 (T0 to T2047)* 0*
Q02H
Q06H
Q12H
Q25H
Q12PH
Q25PH
When X1 is on the timer counts the internal
10ms pulses. When X1 is switched off the
current time counter value is retained. The
timer’s output is switched on when the cur
-
rent value reaches the setpoint value of the
timer.
A separate instruction must be programmed
to reset the timer since it is not reset by swit
-
ching off input X1 or the PLC’s power. Input
X2 resets timer ST0 and switches off its
output.
ST0
t1 t2
X1
Y10
X2
t1 + t2 = 3,45 s

Mitsubishi MELSEC System Q Specifications

General

Brand	Mitsubishi
Model	MELSEC System Q
Category	Controller
Language	English