98
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
4 Devices in Detail
4.5 Timer [T]
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.
2. Retentive type
When the drive input X001 of the timer coil T250 turns ON, the
current value counter for T250 adds and counts clock pulses of
100 ms. When the counted value becomes equivalent to the set
value K345, the output contact of the timer turns on.
Even if the drive input X001 turns OFF or the power is turned off
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
output contact is returned.
3. Potentiometer type
1) When variable analog potentiometers built in the FX3G main unit are used
Values of variable analog potentiometers
built in FX
3G PLCs as standard are stored
as numeric data in the range from 0 to 255
in the following special registers in
accordance with the scale position.
An obtained numeric value can be
specified as the indirectly specified value
for a timer to make a variable
potentiometer type analog timer.
•VR1 → D8030 (Integer from 0 to 255)
•VR2 → D8031 (Integer from 0 to 255)
X000
T200
T200
Y000
K123
1.23 sec
Set value
X000
Current
value
Y000
Set value
(constant)
A data register
can be
specified also.
X001
T250
T250
Y001
K345
Set value
(constant)
A data register
can be
specified also.
X002
RST T250
Current
value
Y001
X001
X002
Set value
t2
t1
Retentive time
t1 + t2 = 34.5 sec
X003
T10 D08030
[Basic example]
This register stores the
value (0 to 255) of variable
analog potentiometer.
0 to 25.5 sec
FNC 22
MUL
D8031 K 2 DO (D1)
M8000
X003
T10
D 0
[Applied example]
"D8030 (VR2) value x 2" is transferred to D0 (D1).
(0 to 51 sec)
The set value range can be
changed (up to 32,767) by multiplying
the register value by "n".
RUN monitor
Do not use D1 in other programs.
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