Timer [T]; Numbers Of Timers; Functions And Operation Examples - Mitsubishi FX3U Series Programming Manual

FX /FX Series Programmable Controllers
3U 3UC
Programming Manual - Basic & Applied Instruction Edition
4.5

Timer [T]

Timers add and count clock pulses of 1 ms, 10 ms, 100 ms, etc. inside the PLC. When the counted value
reaches a specified set value, the output contact of the timer turns on.
A set value can be directly specified by a constant (K) in the program memory, or indirectly specified by the
contents of a data register (D).
4.5.1

Numbers of timers

The table below shows timer (T) numbers. (The numbers are assigned in decimal.)
For 100 ms pulses
0.1 to 3276.7 sec
T 0 to T199
200 points
FX /
3U
-------------
FX
3UC
Routine program
PLC
T192 to T199
Timer numbers not used for timers can be used as data registers for storing numeric values.
*1. Retentive timers are backed up by battery.
4.5.2

Functions and operation examples

General type
X000
T200
T200
Y000
X000
Current
value
Y000
Retentive type
X001
T250
T250
Y001
X002
t1 t2
X001
Current
value
Y001
X002
For 10 ms pulses
0.01 to 327.67 sec
T200 to T245
46 points
type
When the drive input X000 of the timer coil T200 turns ON, the
current value counter for T200 adds and counts clock pulses of
K123
10 ms. When the counted value becomes equivalent to the set
Set value
(constant)
value K123, the output contact of the timer turns on.
A data register
In other words, the output contact turns on 1.23 seconds after the
can be
coil is driven.
specified also.
1.23 sec
When the drive input X000 turns OFF or when the power is
turned off the timer is reset and the output contact returns.
Set value
When the drive input X001 of the timer coil T250 turns ON, the
Set value
(constant) current value counter for T250 adds and counts clock pulses of
K345
A data register
100 ms. When the counted value becomes equivalent to the set
can be
value K345, the output contact of the timer turns on.
specified also.
Even if the drive input X001 turns OFF or the power is turned off
RST T250
during counting, the timer continues counting when the operation
restarts. The retentive operating time is 34.5 seconds.
When the reset input X002 turns ON, the timer is reset and the
Retentive time
output contact is returned.
t1 + t2 = 34.5 sec
Set value
Retentive type for 1 Retentive type for
*1
ms pulses 100 ms pulses
0.001 to 32.767 sec 0.1 to 3276.7 sec
T246 to T249
T250 to T255
4 points
6 points
Interrupt execution
Latched (battery
latched (battery
backed) type
*1
backed) type
4 Devices in Detail
4.5 Timer [T]
For 1 ms pulses
*1
0.001 to 32.767 sec
T256 to T511
256 points
*1
79
1
2
3
4
5
6
7
8
9
10