Xerox ls 32270 Operation of the Xerox LS, Indicators of the Xerox LS, PAR Parallel input

Operation

Xerox LS 3270

3. Operation of the Xerox LS 3270

The Xerox LS 3270 top panel has been designed to register the operation of the box via the following indicator LEDs :

∙CU (contact to Control Unit)

∙PAR (parallel input)

See the illustration in the section Knowing the Front Panel for the position of the LEDs.

3.1. Indicators of the Xerox LS 3270

CU (Contact with Control Unit)

This indicator LED has 3 states:

State	Indication
ON	Contact with the control unit.
BLINKING	1. Contact with the control unit, and data pending
	in the Xerox LS 3270 buffer.
	2. Indicates that the address switch has been
	activated and the box is ready to enter on-line
	HEX dump mode
OFF	No contact to the control unit, or the contact has
	been broken for more than 1 minute.

PAR (Parallel input)

The indicator LED has 2 states:

State	Indication
ON	Indicates that the box is processing data from the
	Centronics parallel port
OFF	Indicates that the box is idle or processing data
	from the coax input

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