Xerox FS 3270 用户手册
Operation
Xerox FS 3270, User's Guide
Xerox FS 3270, User's Guide
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3. Operation of Xerox FS 3270
The Xerox FS 3270 top panel has been designed to register the
operation of the box via the four following indicator LEDs :
operation of the box via the four following indicator LEDs :
•
CU (contact to Control Unit)
•
PAR (parallel input)
•
SER (serial input)
•
READY (printer)
3.1. The Indicators of the Xerox FS 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 FS 3270 buffer.
in the Xerox FS 3270 buffer.
2. Indicates that the TEST switch has been
activated and the box is ready to enter on-line
HEX dump mode
activated and the box is ready to enter on-line
HEX dump mode
3. The CU indicator will be blinking rapidly while
the rotary switch is in the “T” position. This is an
indication that the “T” position is not a valid
permanent position.
the rotary switch is in the “T” position. This is an
indication that the “T” position is not a valid
permanent position.
OFF
No contact to the control unit, or the contact has
been broken for more than 1 minute.
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
Centronics parallel port
OFF
Indicates that the box is idle or processing data
from the coax/RS inputs
from the coax/RS inputs