Mitsubishi MELSEC System Q Manual page 120

Timers
X1
ST0
Y10
X2
Timers of the MELSEC System Q PLC-CPUs
Device
Device identifier
Device type (for setting and polling)
Possible values (timer output)
Device address format
Timer setpoint value entry
Number of devices and
addresses
*
Initial values, the number of timers can be set in the PLC parameters.
5 – 8
t1 t2
t1 + t2 = 3,45 s
Q00J
Q00
Q01
Q02
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.
Timer types
Normal Timer
T
Bit device
0 or 1
Decimal
As a decimal integer constant. The setpoint can be set either directly
in the instruction or indirectly in a data register.
512 (T0 to T511)*
2048 (T0 to T2047)*
Devices in Detail
Retentive Timer
ST
0*
0*
MITSUBISHI ELECTRIC