Network Errors
6-28 72A-1146 Rev. D 8/99
Network Errors
Network errors are fatal errors (they stop the microcomputer) that
occur due to a communication error on either the IEEE-488 Bus or the
SYNC Bus. The F2250 that first detects the problem stops, displays an
error code that specifies the cause of the error, and then stops all
networked F2250s that display a nEt error message.
To recover from a network error, press any control on the front panel of
each networked unit. All units go into the POWER ON state, show Pon in
their TIME display, and when all units are ready, the network becomes
active again.
If this procedure does not clear the error, switch all the F2250s OFF. After
five seconds, power up the units in sequence, starting with the MASTER
unit.
If the error persists, or if recovery cannot be achieved, record all the error
codes and messages. Then attempt to determine which unit is causing the
network error by disconnecting one unit at a time from the network until
the unit causing the error is isolated. Replace the CPUIII or TSG card in
the unit that causes the error. If this does not resolve the error, call Doble.
See "Error Messages" on page 5-1 for a listing of network errors and
messages.
Internal Errors
Internal errors are fatal errors caused by a hardware or software
malfunction which halts the unit and displays an error code.
Recovery is attempted by pressing any control on the front panel of each
networked unit. All units go into the POWER ON state, show Pon in their
TIME display, and when all units are ready, the network becomes active
again. Power system simulators on which these errors occur usually
require servicing. Be sure to note the error messages and codes before
calling Doble.
Figure 6.20 shows a typical display for an internal system error.
SOURCE 1 shows SY (for System), followed by an error code and the
word Error. SOURCE 2 shows the word A T.
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