Omron V022-E3-1 operation manual 8-1Hardware Faults, Section

&￿￿￿-￿￿￿￿￿￿￿￿￿ Section 7-1

8-1 Hardware Faults

When a fault relating to the operation of the NT600S occurs, find the symptoms in the table below and respond by following the corresponding “Remedy” indicated in the table.

Caution Confirm system safety before turning the power ON/OFF or resetting.

￿Otherwise the system may operate unpredictably.

Do not disassemble for repairs or modification. Otherwise the product may malfunction.

NT600S Symptoms	Cause	Remedy
POWER LED fails to	Power is not being supplied.	Check the connections and make sure that power is
come ON		supplied correctly.
		(Refer to “2-2-2 Power Supply Connection”, page 28.)
	Power supply fuse has blown	Contact your OMRON service center.
Nothing is displayed on	Screen #0 has been read at the host	This is not an error. Change the screen number.
the screen (it is	side.	(Refer to “4-3 Screen Display”, page 124.)
completely white/LCD or
	In communication with the Host,	Transfer the screen data to the PT using the support
black/EL).
	screen data is not transferred to the	tool.
	NT600S through RS-232C.
Meaningless characters	The DIP switches at the rear of the	Set DIP switch SW2-2 on the rear of the PT to ON and
are displayed.	terminal have been left at their	switch the power back on.
	factory setting (SW2-2 is OFF).
Communication with the	The Transmit Mode has not been	Display the system menu and select the Transmit
support tool not possible.	established.	Mode.
		(Refer to “4-5 Registering the Screen Data”, page 79.)
	Not connected to the support tool.	Check the installation of the connector cable.
		(Refer to “2-3 Connecting to the Support Tool”, page
		30.)
	PT type setting and direct connection	Using the ”Tool Settings” of the support tool, set the
	setting at the support tool do not	PT type and direct connection settings that match the
	match the NT600S.	NT600S.
	The NT600S Support Tool Mode	Match the setting for the “Support Tool Mode” option in
	setting does not match the support	the memory switch menu of the Maintenance mode
	tool used.	with the support tool being used.
Cannot communicate with	Memory switch settings do not	Check the communication setting in the “Memory
the PC /Host.	match.	Switch” menu of the Maintenance Mode, and match
		the PC and NT600S settings.
		(Refer to “4-6 Setting the Conditions of
		Communications with the PC/Host by Using the
		Memory Switches”, page 83.)
	NT600S and PC/HOST are not	Check that the type, length and installation of the
	correctly connected.	connector cable match the specifications.
		(Refer to “2-4 Connection to a PC by the Host Link”,
		page 31, “2-5 Connection to a PC by the NT Link”,
		page 43.“3-7 Connection to a PC by C200H Direct”,
		page 56, “3-8 Host Connection by RS-232”, page 63.)
	When NT link (1:N), there is unit	Set again with no duplication.
	number duplication.
	In a host link connection, the PC	Set the PC termination resistance correctly.
	termination resistance setting is	(Refer to “2-4 Connection to a PC by the Host Link”,
	incorrect.
		page 31.)
	Power not supplied to the NT600S,	Check the power supply.
	PC, or host

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