Omron NT631C manual 228

Troubleshooting		Section 7-1
NT631/NT631C	Cause	Remedy
Symptoms
Updating of numeric val-	Malfunction due to external noise	Carry out grounding work in accordance with the
ues and text is delayed.		conditions by referring to 3-1-4 Grounding, page 34.
	There are too many numeral/text dis-	Reduce the number of numeral/text displays on the
	plays on the displayed screen.	screen for which updating is delayed.
	The cycle time is extended due to	Shorten the host cycle time.
	heavy processing at the host.
	In an RS-422A/485 connection, there	Wire correctly by referring to SECTION 5 Connecting
	is illegal branching or an erroneous	to the Host from the RS-422A/485 Port.
	terminator setting.
Some of the elements	The quantity of read data exceeds the	Check the maximum number of elements by referring
arranged on a normal	stipulated restriction.	to Display Restrictions in Appendix A of the Refer-
screen are not displayed.		ence Manual, creating the screen data again, and
	The total of the element coefficients
		transmitting all of the screen data in a batch to the
	for the displayed screen is greater
		NT631/NT631C.
	than 1024.
On an overlapping screen,	Since the data is transmitted from the	Check the maximum number of elements by referring
some of the set elements	host in screen units, the number of	to Display Restrictions in Appendix A of the Refer-
are not displayed.	elements on the overlapping screen	ence Manual, creating the screen data again, and
	has exceeded the maximum permis-	then sending all the screen data in a batch to the
	sible without being checked by the	NT631/NT631C.
	Support Tool.
The System Menu cannot	Display System Menu under Change	In the System Installer mode, set Display System
be called up.	System Settings in the System	Menu to Enabled (page 147).
	Installer mode is set to Disabled.
The following System	Screen Memory Protect under	In the System Installer mode, set Screen Memory
Menu operations are not	Change System Setting in the Sys-	Protect to Enabled (page 147).
possible.	tem Installer mode is set to Disabled.
- Establishing the Transmit
	Screen Memory Protect has been set	Do not turn the PT power OFF during deletion of
mode	to Disabled because the PT power	screen data.
- Displaying the memory	supply was turned OFF during dele-	In the System Installer mode, first change the setting
switch setting screens	tion of screen data.	for Screen Memory Protect to Enabled, then repeat
- Screen data memory		the screen data delete operation (page 148)
check
- Displaying the initializa-
tion menu
- Displaying the calendar/
time setting screen
Cannot input numeric val-	The upper/lower (max./min.) limit	Check the screen data’s upper/lower (max./min.) limit
ues	check for numeric value input is in	check setting for numeric value input, and correct it if
	effect.	necessary. Refer to 2-12 Inputting Numeric Values in
		the Reference Manual for details.
The display is too faint.	The contrast is too high.	Reduce the contrast (page 187).
Cannot input numeric val-	Bit 5 of the PT status control area	Set bit 5 to 0 (OFF). Refer to 2-2-1 PT Status Control
ues/character strings.	(numeral/character string input) is set	Area (Host ↔ PT) in the Reference Manual for
	to 1 (ON).	details.
	The interlock function is set for the	Inputs are prohibited in input fields when the corre-
	input field and the controlling interlock	sponding interlock bit is OFF. Check the status of the
	bit is OFF.	corresponding interlock bit and turn it ON.
Window screen does not	Bit 6 of the PT status control area (PT	Set bit 6 to 0 (OFF). Refer to 2-2-1 PT Status Control
open	window opening) is set to 1 (ON).	Area (Host ↔ PT) in the Reference Manual for
		details.
Cannot switch screens	Bit 4 of the PT status control area (PT	Set bit 4 to 0 (OFF). Refer to 2-2-1 PT Status Control
with touch switches	screen switching) is set to 1 (ON).	Area (Host ↔ PT) in the Reference Manual for
		details.
Touch switch does not	The interlock function is set for the	Touch switches are disabled when the corresponding
work. (Buzzer sounds.)	touch switch and the controlling inter-	interlock bit is OFF. Check the status of the corre-
	lock bit is OFF.	sponding interlock bit and turn it ON.

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