Omron NT631C manual Error Probable Cause Remedial Action

Using a Memory Unit Section 3-5

Within the PT Model, the system program inside memory compatible PT model

• The RUN LED flashes.

If a protect setting error occurs when executing manual transmission, it is pos- sible to return to the Memory Unit manual transmission screen by pressing the OK touch switch, but in the case of other errors, the status described above remains in effect until the NT631/NT631C power is turned OFF or reset.

The compatibility relationships are shown below.

NT631	System program for NT631/NT631C without the -V suffix, and for
NT631C	NT631/NT631C with the -V1 and -V2 suffix
NT631C-EV3	System program for NT631C with the -V3 suffix

When an error occurs, take remedial action by referring to the table below.

Error	Probable Cause	Remedial Action
Mode setting error	DIP switches SW1-1 to	Turn the NT631/NT631C power
	SW1-3 are all OFF, or	OFF, set the Memory Unit DIP
	more than one is ON.	switches correctly, then turn the
		NT631/NT631C power back ON.
Protect setting error	Writing to the data write	Turn the NT631/NT631C power
(automatic transmis-	destination has been pro-	OFF, set the Memory Unit DIP
sion)	hibited by the setting of	switches correctly, then turn the
	SW2-1 or SW2-2.	NT631/NT631C power back ON.
Protect setting error	Writing to the data write	Perform either of the following pro-
(manual transmis-	destination has been pro-	cedures.
sion)	hibited by the setting of	• Press the OK touch switch to
	SW2-1 or SW2-2.
		return to the Memory Unit manual
		transmission screen, make the
		correct settings, then try again.
		• Turn the NT631/NT631C power
		OFF, correct the DIP switches set-
		tings of the Memory Unit, then
		turn the power back ON.
Flash memory error	An error occurred during	Turn the NT631/NT631C power
	initialization of the	OFF, then back ON. If the error
	NT631/NT631C or Mem-	recurs, the flash memory at the
	ory Unit flash memory, or	write destination may be faulty. In
	during write processing.	this case, replace the PT.
Verify error	An error occurred during	Turn the NT631/NT631C power
	verification processing at	OFF, then back ON. If the error
	the flash memory of the	recurs, the flash memory at the
	NT631/NT631C or the	write destination may be faulty. In
	Memory Unit.	this case, replace the PT.
Transmitting data	An attempt is made to	Perform either of the following pro-
error	transmit data other than a	cedures.
(The automatic	system program or the	• Turn the NT631/NT631C power
transmission only)	system program of a dif-
		OFF, correct the DIP switch set-
	ferent PLC model into the
		tings of the Memory Unit, and
	NT631/NT631C as the
		then turn the power back ON.
	system program.
		• Turn the NT631/NT631C power
	An attempt is made to
		OFF, set the DIP switch settings
	write a system program
		to the manual transmission, and
	into the NT631/NT631C
		then check the data inside the
	as screen data.
		Memory Unit.

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