I-E96-217A
5 - 1
SECTION 5 - TROUBLESHOOTING
INTRODUCTION
This section explains the error indications and corrective
actions for the Serial Port Module (SPM). It also contains proce-
dures to run a serial port checkout and module bus checkout
test.
NOTE: If the corrective actions in this section do not correct a prob-
lem with the SPM, replace it or contact your nearest Bailey Controls
representative. Refer to
for procedures to replace an SPM.
ERROR INDICATIONS AND CORRECTIVE ACTION
After power up or reset, the SPM conducts self tests to deter-
mine its operating status. A failure of these tests causes a
module
time out
. The status can be obtained through the front
panel module status LED indicator.
The status LED group can be observed during start-up to
determine the current on-line test being run. It can also be
observed during normal operation to determine the current
computer command and SPM reply sequence. Refer to
to interpret the start-up indications.
NOTE: If you determine the SPM is faulty, replace it with a new one.
DO NOT try to repair the module; replacing components may affect
the module performance.
MODULE STATUS LED
The front panel status LED has three states to indicate normal
operation and error conditions. Table
lists SPM status LED
states, indications, probable causes and corrective actions.
NOTES:
1.
If the status LED is indicating an error condition (
time out),
press the module reset switch to attempt to reset the error. It can be
accessed through the faceplate.
2.
Module status cannot be read for this module.
Refer to
for an explanation of the Machine Fault
Timer.