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Appendix 3. Frequently Asked Questions
Q
I was monitoring operations using
GX Works2, but the operation
time was not what I had expected.
Can the ladder diagram created
using FX-PCS/WIN-E be read on
GX Works2?
I want to use the numerical values
in the programmable controller in
the spreadsheet of my personal
computer.
I want to write comments on the
programmable controller.
I transferred comments from the
programmable controller, but they
are not displayed.
Can A6GPP or A7PHP be used to
modify FX
programs?
2N
Devices and programs
Q
What is the difference between a
standard counter and a high-
speed counter?
How do you use high-speed
counters?
Do I need to adjust the input filter
when I use a high-speed counter
or an external interrupt instruc-
tion?
An operation error occurred in an
application instruction that uses
the current value of the high-
speed counter and cannot be
executed.
The latch relay is not kept.
What is the difference between a
file register and a standard regis-
ter?
How can I use dedicated devices
for backup power (auxiliary relay
and state) in normal occasions?
How do I use the built-in variable
analog potentiometer in the pro-
grammable controller (FX
FX
, or FX
)?
1N
3G
In the monitor display of GX Works2, the scan time is the maximum
value.
Check D8010 to confirm the current scan time.
Select [Project Menu] and [Read other file format], and specify the
FX-PCS/WIN-E program file.
The data can be transferred with a simple configuration using MX
Sheet of the MELSOFT MX series.
Use GX Works2 to set the comment capacity in the parameter set-
ting of the programmable controller.
To write the comment you wrote into the programmable controller,
configure the "Comment Scope Setting" of GX Works2.
The comments might not have been written into the programmable
controller. Refer to the preceding question for details.
They are not supported in FX
but the instructions and devices that can be modified are limited.
The upper count limit for a standard counter is 10Hz.
For high-speed input signals that exceed the limit, use high-speed
counters, interrupt instructions, and other methods to make sure
they are not affected by the input filter of the programmable con-
troller or the operation cycle.
Keep the OUT coil of the high-speed counter turned on for the
period in which you want to perform high-speed count.
Do not use the input number (X0 to X7) of counters as the contact
point to run the OUT coil of high-speed counters.
If the coils of high-speed counters and interrupt pointers are pro-
grammed, the filter constant of the corresponding input terminal is
automatically adjusted to the minimum value by the programmable
controller system.
The register for the current value of high-speed counters is a 32-bit
register.
Application instructions that use this value must also be 32-bit
instructions. Using a 16-bit instruction will result in an operation
error.
If there is an OUT instruction that uses a latch relay number in the
sequence program, the latch information may be overwritten and
deleted by the OUT instruction. Do not use OUT instructions for
device numbers that you want to keep. Use SET instructions
instead.
It is convenient to use file registers to store predetermined values
(such as values of standard for product inspection).
On the other hand, standard registers are cleared to 0 when the
programmable controller is turned off (excluding the latched (bat-
tery backed) area), so it is used as a temporary storage area for
numerical values used in sequence programs.
Use the initial pulse to clear the required scope with the ZRST
instruction when the programmable controller is running.
Use M8032 to clear all backup power areas.
The values are stored in a special data register as numerical data
(between 0 to 255) according to the scale position.
Set the loaded numerical value as indirect specified value to create
,
a volume-based analog timer.
1S
· VR1→D8030 (integer of 0 to 255) - VR2→D8031 (integer of 0 to
255)
A
. It can be programmed within FX
2N
A
1
2
3
A1
,
2
A2
A3
47
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