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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
4 Devices in Detail
4.5 Timer [T]
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.)
1. FX3U/FX3UC PLC
2. FX
3G PLCs
Timer numbers not used for timers can be used as data registers for storing numeric values.
*1. In FX
3U/FX3UC PLCs, retentive type timers are backed up by the battery.
*2. In FX
3G PLCs, retentive type timers are backed up by the EEPROM memory.
4.5.2 Functions and operation examples
1. General 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 10 ms. When
the counted value becomes equivalent to the set value K123, the
output contact of the timer turns on.
In other words, the output contact turns on 1.23 seconds after the coil
is driven.
When the drive input X000 turns OFF or when the power is turned off
the timer is reset and the output contact returns.
For 100 ms pulses
0.1 to 3276.7 sec
For 10 ms pulses
0.01 to 327.67 sec
Retentive type for 1
ms pulses
*1
0.001 to 32.767 sec
Retentive type for 100
ms pulses
*1
0.1 to 3276.7 sec
For 1 ms pulses
0.001 to 32.767 sec
T 0 to T199
200 points
-------------
Routine program type
T192 to T199
T200 to T245
46 points
T246 to T249
4 points for
Interrupt execution
Latched (battery
backed) type
*1
T250 to T255
6 points
Latched (battery
backed) type
*1
T256 to T511
256 points
For 100 ms pulses
0.1 to 3276.7 sec
For 10 ms pulses
0.01 to 327.67 sec
Retentive type for 1
ms pulses
0.001 to 32.767 sec
Retentive type for
100 ms pulses
0.1 to 3276.7 sec
For 1 ms pulses
0.001 to 32.767 sec
Potentiometer type
0 to 255
(numeric value)
T 0 to T199
200 points
-------------
Routine program
type
T192 to T199
T200 to T245
46 points
T246 to T249
4 points
*2
for
Interrupt execution
Latched type
T250 to T255
6 points
*2
Latched type
T256 to T319
64 points
2 built-in points
Stored in D8030 and
D8031
X000
T200
T200
Y000
K123
1.23 sec
Set value
X000
Current
value
Y000
Set value
(constant)
A data register
can be
specified also.