Omron NT31 NT31C Responding to Displayed Error Messages, Message Cause Remedy, Maintenance Mode

Responding to Displayed Error Messages		Section 7-2
NT31/NT31C Symptoms	Cause	Remedy
The display is dim.	Insufficient contrast or brightness	Increase the contrast/brightness (pages 191 and
		193).
	Backlight defective, or its life has	Replace the backlight (page 242).
	expired
The display is too faint.	The contrast is too high.	Reduce the contrast (page 191).
The digits in numeral	The number of digits of a numeric	• Confirm the values of the PC words allocated to the
display come out as *.	value in a numeral memory table	numeral memory table.
	exceeds the set number.	• Allocate one PC word to each numeral memory
		table.
”**” or ”***” is displayed	The numeric value in the numeral	• Check the values of the PC words allocated to the
in the numeral display or	memory table exceeds the number	numeral memory table entry.
numeral input field.	of display digits.	• Allocate only one word to each numeral memory
		table entry if the numeral display or numeral input
		field has 4 digits or less.

7-2 Responding to Displayed Error Messages

When the NT31/NT31C 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 correc- tive action to take for them, refer to 3-5 Using a Memory Unit (NT31/NT31C with Vj) in page 39 or 3-6 Using a Memory Unit (NT31/NT31C without Vj) in page 47.

7-2-1 Errors Occurring at Start of Operation and Their Remedies

The table below shows the errors that can occur when the power to the

NT31/NT31C is turned ON and when operation starts, and their remedies.

Message	Cause	Remedy
[No Comm. Protocol]	No communication protocol has	Using the memory switches, set the
Set the comm. Protocol by	been set.	communication method to be used for
		communication with the host. (6-7 Setting
MAINTENANCE MODE.	Communication protocol and
		Conditions for Communications with Host
	screen data type are mismatched
		by Using Memory Switches, page 157)
[Screen Data Error]	- The power was switched OFF	Initialize the screen data memory by
Screen Data corrupted.	during screen data	operation at the System Menu, then
	initialization, checking, or	re-transmit the screen data. (6-4-1
Initialize Screen Memory, and download
	transmission.	Clearing Screen Data, page 140)
Screen Data again.
	- Transmission of screen data	If the problem persists, contact your
	was interrupted.	OMRON service center.
	- Illegal data has been written to
	the screen data memory.
[No Screen Data]	No screen data is registered.	Transmit screen data from the Support
No Screen Data is saved in Screen		Tool.
Memory.
Download Screen Data using by the
Support Tool.
Then set the PT to the TRANSMIT
MODE, and download Screen Data
again.

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