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Responding to Displayed Error Messages
Section 7-2
7-2 Responding to Displayed Error Messages
When the NT20S displays an error message, find the corresponding symptoms in
the appropriate table below and respond by following the “Remedy” indicated in
the table.
7-2-1 Errors Occurring when the Power is Turned ON
The table below shows the errors that can occur when the power supply to the
NT20S is turned ON, and their remedies.
Message Cause Remedy
Screen Data Corrupted There is an error in the registered
screen data.
After initializing the screen data memory in the
Maintenance Mode, transmit the screen data once
more with the support tool.
Mark Data Corrupted There is an error in the registered
mark data.
After initializing the screen data memory in the
Maintenance Mode, transmit the screen data once
more using the support tool.
No direct information is
set!
(NT20S-ST121-EV3/
The allocated words for the PT
status control area and PT status
notify area have not been set .
Use the support tool to set the head words of the PT
status control area and PT status notify area, and
transmit the screen data again.
ST122-V1)
There is no screen data. Transmit screen data from the support tool.
7-2-2 Errors Occurring During Operation
The table below shows the errors that can occur during operation of the NT20S,
and their remedies.
Message Cause Remedy
Setting Error Bits or words allocated to the PC
memory cannot be found in the
screen data.
Check the memory area in the PC used and correct
the bit and word allocations in the screen data.
QQ command is not
available
The PC cannot be connected to the
NT20S.
Select a type of PC that can be connected to the
NT20S.
7-2-3 Errors Occurring on Screen Data Initialization
The table below shows the errors that can occur when data is written to the NT20S
screen data memory, and their remedies.
Message Cause Remedy
Initialization Error Hardware fault or screen data
memory life reached
If the same message is displayed even after executing
screen data memory initialization or screen data
transmission several times, contact your OMRON
service center.
7-2-4 Communication Errors
This section describes the errors relating to communication with the PC/Host that
can occur during operation, and their remedies.
S Operation when a communication error occurs
When a communication error occurs, the error message is displayed at the
NT20S, and the buzzer sounds. Error messages are displayed when the “Auto-
matic Reset” memory switch is not set.
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