7-3 Troubleshooting and Maintenance
7-10
Errors during PT Operation
Symptoms at
PT
Causes Measures
Power is not being
supplied to the PT.
Check the connection points and supply power to the PT
correctly. (Refer to 3-1 Installing the PT.)
RUN indicator
does not light.
The fuse is broken. Contact your nearest OMRON representative.
The PT is in system
startup waiting
status.
This is not an error. Information will be displayed when the
waiting time has lapsed.
The screen saver
function is operat-
ing.
This is not an error. Touch the screen, or operate the sys-
tem memory for switching the screen from the host to
switch the screen as follows:
• Set the screen number in $SW0.
• Set the pop-up screen number in $SW1, 4 and 7.
(Refer to 2-4 System Memory in the PT Programming
Manual for details on the system memory.)
The backlight is
OFF.
Turn ON the backlight by setting system memory bits $SB6
to 8 for adjusting backlight brightness to ON. (Refer to 2-4
System Memory in the PT Programming Manual for details
on the system memory.)
The screen is
blank.
The backlight has
malfunctioned.
The backlight must be replaced, so contact your nearest
OMRON representative.
Screen switching,
opening and closing
pop-up screens,
and switching
frames are being
performed fre-
quently.
If screens are opened and closed frequently, the display
update may take some time and communications may be
delayed.
Adjust the interval between screen switches so that the
system is not overloaded.
The display
update is slow.
The message
communications
interval is too long.
On the NS-Designer, select Settings - System Setting,
click the Comm-All Tab, press the Comm. Details Button,
and set a shorted communications interval. (Refer to Sec-
tion 7 System Settings of the NS-Designer Operation Man-
ual.)
PT has malfunc-
tioned due to exter-
nal noise.
Reset the PT, and wire it according to noise prevention
measures.
The touch
panel does not
respond.
The touch panel is
damaged.
Test the touch panel using the hardware check in the Sys-
tem Menu. If an error has occurred, contact your nearest
OMRON representative.
The brightness set-
ting is too low.
Increase the backlight brightness in the PT Tab Page of the
System Menu.
The display is
dark.
The backlight is
faulty or its service
life has expired.
The backlight must be replaced. Contact your nearest OM-
RON representative.
The communica-
tions settings are
incorrect.
When using the device monitor, set the communications
mode as follows:
• C-series PLCs:
1:1 NT Link or 1:N NT Links
• CS1-series PLCs:
1:N NT Links (normal, high speed)
The device monitor function is not supported for Ethernet
or Controller Link.
Cannot enter
the device
monitor func-
tion.
The PLC does not
support the device
monitor function.
The PLCs that support the device monitor function are re-
stricted. Check the PLC model being used.
(Refer to 6-8-4 Device Monitor.)
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