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5 Troubleshooting
NA-series Programmable Terminal Hardware User’s Manual (V117)
5-2 Troubleshooting
5
5-2-5 Troubleshooting NA Unit Errors
The display is dark. The screen is too dark. • Increase the brightness of the screen in the bright-
ness setting on the System Menu.
• Increase the screen brightness setting in the project
and download the project again.
The Backlight is faulty or
has reached the end of its
life.
The Backlight needs to be replaced. Inquire at the con-
tact given on the back of this manual.
Numbers or characters
are refreshed too
slowly.
Communications are not
stable due to external
noise.
Separate the communications cables from power lines
and perform other noise countermeasures.
There are too many
objects.
Decrease the number of objects on the screens for
which refreshing is slow.
There is a heavy process-
ing load on the con-
nected device that is
resulting in extended
cycle times.
Reduce the cycle time of the connected device.
The message communi-
cations interval is too
long.
Shorten the refreshing interval of the variable that is
allocated to the object.
Gauges are refreshed
too slowly.
Too many objects overlap
the gauges.
If multiple images are stacked behind the gauges, put
them together in a single image.
Lay out the gauges so that they do not overlap with
other objects.
Some of the objects on
the screen are not dis-
played.
The IsVisible Check Box
is not selected in the
object settings.
Select the IsVisible Check Box in the object properties
on the Sysmac Studio.
If you change the IsVisible property, e.g., from a sub-
routine, set it to True.
The trend graph dis-
play does not match
the actual log timing.
The communications
address that is set as the
event for the log timing is
turning ON and OFF at a
high speed.
Increase the ON/OFF interval for the communications
address used as the event.
Numeric values cannot
be input.
The upper/lower limit
check for numeric inputs
is operating.
Check the Minimum Value and Maximum Value proper-
ties of the object on the Sysmac Studio and correct
them as required.
When an object is
touched, nothing is
input or executed.
A communications error
occurred.
Check the connection between the NA Unit and con-
nected device.
The IsEnabled Check Box
is not selected in the
object settings.
Select the IsEnabled Check Box in the object proper-
ties on the Sysmac Studio.
If you change the IsEnabled property, e.g., from a sub-
routine, set it to True.
Security is set. Log in at a level where the operation is allowed.
Operation is not possi-
ble for all objects.
The NA Unit is in Input
Prohibited Mode.
Use the EnableInputOperation
function or En
ableInput-
Operation action to enable the inputs that are currently
prohibited.
Log in at a level where input is allowed.
The NA Unit will not
change to the System
Menu.
The currently logged in
user does not have per-
mission.
Go to the System Menu and log in as a level that has
permission to display the System Menu.
NA Unit symptom Cause Correction
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