Responding To Displayed Error Messages - Omron NT21 - SETUP MANUAL 10-2001 Setup Manual

Responding to Displayed Error Messages

NT21 Symptoms
The following System
Menu operations are not
possible.
- Establishing the
Transmit mode Transmit mode
- Displaying the memory
switch setting screens
- Screen data memory
check
- Displaying the
initialization menu
Cannot input numeric
values
Cannot input numeric
values/character strings.
Window screen does not
open
Cannot switch screens
with touch switches
Touch switch does not
work. (Buzzer sounds.)
The display is dim.
The display is too faint.
The digits in numeral
display come out as *.
7-2

Responding to Displayed Error Messages

176
Cause
Screen Memory Protect under
Change System Setting in the
System Installer mode is set to
Disabled.
Screen Memory Protect has been
set to Disabled because the PT
power supply was turned OFF during
deletion of screen data.
The upper/lower (max./min.) limit
check for numeric value input is in
effect.
Bit 5 of the PT Status Control Area
(numeral/character string input) is
set to 1 (ON).
The interlock function is set for the
input field and the controlling
interlock bit is OFF.
Bit 6 of the PT Status Control Area
(PT window opening) is set to 1
(ON).
Bit 4 of the PT Status Control Area
(PT screen switching) is set to 1
(ON).
The interlock function is set for the
touch switch and the controlling
interlock bit is OFF.
The contrast setting is too low.
Backlight defective, or its life has
expired.
The contrast setting is too high.
The number of digits of a numeric
value in a numeral memory table
entry exceeds the set number.
When the NT21 displays an error message, find the corresponding symptoms in
the appropriate table below and respond by following the Remedy indicated in
the table. For details of the error messages displayed when using Memory Unit
and corrective action to take for them, refer to 3-5 Using a Memory Unit in page
31.
Remedy
In the System Installer mode, set Screen Memory
Protect to Enabled (page 121).
Do not turn the PT power OFF during deletion of
screen data.
In the System Installer mode, first change the
setting for Screen Memory Protect to Enabled, then
repeat the screen data delete operation (pages 121
and 121)
Check the screen data's upper/lower (max./min.)
limit check setting for numeric value input, and
correct it if necessary. Refer to 2-12 Inputting
Numeric Values in the Reference Manual for details.
Set bit 5 to 0 (OFF). Refer to 2-2-1 PT Status
Control Area (Host ↔ PT) in the Reference Manual
for details.
Inputs are prohibited in input fields when the
corresponding interlock bit is OFF. Check the status
of the corresponding interlock bit and turn it ON.
Set bit 6 to 0 (OFF). Refer to 2-2-1 PT Status
Control Area (Host ↔ PT) in the Reference Manual
for details.
Set bit 4 to 0 (OFF). Refer to 2-2-1 PT Status
Control Area (Host ↔ PT) in the Reference Manual
for details.
Touch switches are disabled when the
corresponding interlock bit is OFF. Check the status
of the corresponding interlock bit and turn it ON.
Increase the contrast with the contrast adjustment
on the back of the NT21.
Contact your OMRON service center. (The backlight
cannot be removed.)
Reduce the contrast with the contrast adjustment on
the back of the NT21.
• Confirm the values of the PC words allocated to the
numeral memory table.
• Allocate one PC word to each numeral memory
table entry.
Section 7-2