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Appendix 3. Frequently Asked Questions
The LED will not turn on even
after short circuiting COM and the
input with just the extension mod-
ule.
What are sink input and source
input?
Do the COMs in the input and out-
put side of FX
the same signal?
Input terminals of FX
programmable controllers and
programmable controllers of other
series with overseas specifica-
tions have an "S/S terminal". How
is it used?
There are multiple COM terminals
starting with COM1 in the output.
How are they different?
Is the protective element of the
relay output required?
Can the "·" vacant terminal of
input and output terminals be
used as a relay terminal?
Memory cassette
What do I need to configure when
mounting a memory cassette to a
programmable controller?
Is a battery required to use a
memory cassette?
Are there are any specific settings
required for a battery-less opera-
tion?
Software-related
The personal computer where the
programming software is installed
only has a USB interface. How
can I connect it to the program-
mable controller?
46
Q
The extension module must be connected to the main module for
the input to turn on.
Sink input is a 24VDC negative common input.
Source input is a positive common input. Sink input is generally
used in Japan and North America, while source input is used in
Europe.
Each COM terminal is connected to the programmable controller
and FX
have
1S
1N
inside, so they all have the same signal.
The terminal is used to switch between sink and source input.
and FX
3G
3U
During source input, the device is connected to the [0V] terminal,
and when [24V] - [Input terminal: X□□□] is short-circuited, the input
is turned on.
During sink input, the device is connected to the [24V] terminal,
and when [0V] - [Input terminal: X□□□] is short-circuited, the input
is turned on.
The output element of the programmable controller has a common
unit structure of 1 point, 4 points, and 8 points. Numbers are
assigned from COM0 for every common line.
In terms of wiring, a different voltage can be applied to each COM
terminal.
We recommend connecting diodes for commutation for DC load
and surge absorbers (C-R) for AC load as protection for relay con-
tacts.
Do not use vacant terminals.
Q
Turn off the programmable controller, mount the memory cassette,
and turn the programmable controller back on to automatically
identify the memory cassette.
After it is mounted, it is separated from the built-in memory of the
programmable controller, and data from peripherals is read and
written only to the optional memory.
With the exception of RAM memory, memory cassettes do not
delete sequence programs, so no battery is required. However, a
battery is needed to use the clock function, auxiliary relay, data
register, or other latch functions of the device.
A latch function may be required for special data registers, special
auxiliary relays, and other similar devices.
For details, refer to programming manuals.
When performing a battery-less operation in FX
and FX
ler parameters from GX Works2 and similar tools.
For details on how to configure using sequence programs, refer to
programming manuals.
Q
Connect it using FX-USB-AW.
To use FX-USB-AW, install the driver software for personal com-
puters that comes with the product.
(FX
ble controllers, and a USB port is included as a standard built-in
feature in FX
, set battery-less operation in the programmable control-
3UC
-USB-BD can also be used for FX
3U
programmable controllers.)
3G
A
A
, FX
2N
3U
A
and FX
programma-
3U
3UC
, FX
,
2NC
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