CHAPTER 9: Diagnostics
85
9.2 Off-Line Diagnostics
The Off-line diagnostic capabilities of the LinkUp 5294 include:
• Self diagnostics at power up
• Monitoring of LU and Port Assignment Status
• Character Display Test
• Character Echo Test
• Product Configuration and Levels display
• LU and Async Port Summary (deluxe model only)
• SNA/SDLC Counters (deluxe model only)
9.2.1 S
ELF
D
IAGNOSTICS
Prior to the execution of the continuous background testing by the LinkUp 5294 Watchdog Timer, a
series of preliminary self-tests is performed every time your LinkUp 5294 unit is powered on. These tests
enable the LinkUp 5294 to assure you that its vital parts (ports, memory, programs, etc.) are in working
order.
During the power-on self-tests all the front panel LEDs are off and
dr
is displayed on the
CHANNEL/ERROR LEDs. The LinkUp 5294 usually remains in this condition for approximately three
seconds; it then returns to its normal front-panel LED displays, ready for operation. (The default port
number displayed on the CHANNEL/ERROR LEDs is always 02.) If one or more of the internal tests
fails,
dr
will remain in the CHANNEL/ERROR display and the front panel LEDs will indicate the nature
of the failure. The coding is depicted in the list below.
• DCE LED Off — Watchdog Timer Error
• DTE LED Off — ROM Test Failure
• TXD LED Off — Data Bus Failure
• RXD LED Off — Address Bus Failure
• RTS LED Off — RAM Test Failure
• CTS LED On — At least 512K of RAM
• DTR LED Off — Sync 8530 Failure
• DSR LED Off — Async 8530 Failure
• DCD LED Off — Insufficient EEPROM
9.2.2 LU
AND
P
ORT
A
SSIGNMENT
S
TATUS
When you type STATUS at the Enter Item To Be Configured prompt while in Configurator Mode,
the LinkUp 5294 responds by displaying a table containing the current operating status and port
assignments of all 32 Logical Units. The information provided in this table enables you to isolate,
at a glance, most interface problems you may encounter while operating the LinkUp 5294.