ERROR CODES
AND DIAGNOSTICS
UNILINK HOST
ADAPTER 6–10
USER MANUAL
6.4.1
The LEDs
Only the Adapter Good LED is visible through the door during normal
operation.
The Adapter Good LED will remain lit when the adapter is operating
properly. The remaining LEDs assume the meanings shown in Figure 6–2
during
normal operation. At any given time, the Online, Receive, and T
ransmit
LEDs
may be on, off, or flashing during normal operation.
Adapter
Good Online Receive Transmit
Figure 6–2 LEDs During Normal Operation
6.4.2 Performing
Diagnostic T
ests
The
diagnostic tests are initiated either by pressing the
RESET switch located
to
the left of the LEDs or by issuing one of the software reset commands.
Pressing the RESET switch or sending the
RESET
ADAPTER
command (code FF) causes a
hardware
reset and stops all system operation.
All buffers and macros will be cleared and the
adapter will enter the diagnostic test mode
regardless
of the system activity
in progress at
the time.
There are two diagnostic test modes available for checking the adapter’s
operational
integrity
. These modes are selected by the setting of Position 10
on
Dipswitch
2 shown in Figure 6–3. When
the switch is down, the adapter is in the
run mode or normal operation mode. Any reset by a command or the RESET
switch
will cause the adapter to perform its diagnostics and then return to run
mode with the Adapter Good LED lit if the tests are successful. If an error
occurs, the LEDs will be lit in a pattern that defines the particular test that
failed.
These patterns are described
in Paragraph 6.4.3. The diagnostic tests in
this
mode do not perform any of the external loopback tests.