Omron NT31 NT31C manual Programming Console Function, Omron

Troubleshooting		Section 7-1
NT31/NT31C Symptoms	Cause	Remedy
The graph display does	One of the percentage display	Set the −100%, 0%, and 100% values in the
not change.	settings — −100%, 0%, or 100% —	following relationship:
	is incorrect.	−100% value < 0% value < 100% value
The trend graph display	The cycle for graph display update	Delete other elements on the same screen as the
does not agree with the	processing is longer than the set	trend graph that are allocated to the host and have
actual time axis.	sampling cycle.	a high update frequency. Or lengthen the sampling
		cycle.
The Programming	The communication settings are	Set the communication method as follows when
Console function cannot	incorrect.	using the Programming Console function.
be used.		S With C-series PLC: 1:1 NT Link
		S With CS1-series PLC:
		1:N NT Link (standard or high-speed)
	A Programming Console is	It is not possible to use a Programming Console and
	connected.	the Programming Console function at the same
		time. Disconnect the Programming Console.
	The PC does not support the	Not all PCs support the Programming Console
	Programming Console function.	function. Check the model of PC you are using.
		(6-12 Programming Console Function, page 221)
	The system program for other	The Programming Console function can be used
	vendor’s PCs has been installed.	only when the system program for OMRON PCs is
	(PC models other than OMRON.)	installed. Install the correct system program.
The Device Monitor	The communications settings are not	Set the communication method as follows when
function cannot be used.	correct.	using the Device Monitor function.
		S With C-series PLCs: 1:1 NT Link or 1:N NT Link
		S With CS1-series PLCs:
		1:N NT Link (standard or high-speed)
	The PC does not support the Device	Not all PCs support the Device Monitor function.
	Monitor function.	Check the model of PC you are using. Refer to 6-13
		Device Monitor Function for details.
	The system program installed in the	The Device Monitor function can be used only when
	PT is for a PC maker other than	the PT is connected to a PT with the system
	OMRON.	program for OMRON PCs installed. Install a system
		program that supports the Device Monitor function.
The memory table display	Since the memory table is allocated	When the contents of the memory table are set as a
contents differ from the	to the host memory, the display is	fixed value, do not allocate the memory table to the
initial value set at the	updated in accordance with the	host.
Support Tool.	contents of the host memory.
	The battery voltage has dropped and	Replace the battery and execute memory table
	the data in the memory table has	initialization. (7-3-1 Replacing the Battery, page 244,
	been destroyed.	and 6-4-5 Initializing the Memory Tables, page 147)
	Since ON is set for the resume	Execute memory table initialization. (6-4-5
	function, the initial values of the	Initializing the Memory Tables, page 147)
	screen data memory are not written	If the resume function does not need to be used,
	to the memory tables.
		use the NT31/NT31C with the resume function OFF.
		(6-9-10 Setting the Resume Function, page 181)
	The numeral memory table is	Calculations are executed continuously while the PT
	specified as the destination for a	is operating and the calculation results are
	mathematical table’s results.	automatically written to the memory table. Specify
		another numeral memory table or a word in the
		host.

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