INTRODUCTION
I-E96-209A
5 - 1
SECTION 5 - TROUBLESHOOTING
INTRODUCTION
This section explains the error indications and corrective
actions for the Logic Master Module (IMLMM02).
NOTE: If the corrective actions in this section do not correct a prob-
lem with these modules, replace the module or contact your nearest
Bailey Controls representative. Refer to the repair/replacement sec-
tion for procedures to replace an LMM.
ERROR INDICATIONS AND CORRECTIVE ACTION
The status of the LMM can be obtained through an operator
interface or the front panel LED indicators. An operator inter-
face can also be used to verify the input values sent to the LMM
from a slave module. Operator interfaces include the Configu-
ration and Tuning Module (CTM), Configuration and Tuning
Terminal (CTT), Operator Interface Station (OIS), Management
Command System (MCS) or Engineering Work Station (EWS).
Logic Master Module Indicators
The LMM has a single status LED indicator. This indicator
shows either normal operating conditions or error conditions.
Status LED
The status LED indicates both normal and error conditions for
the LMM. Table
summarizes the LED states, probable
causes and corrective actions to take for the different indica-
tions. An explanation of the error indications follows.
Solid Red
A solid red LED indicates a fatal error has occurred. With this
type of error, the modules halts all operation and does not
communicate over the module bus. Without communication
over the module bus, the module status bytes cannot be
accessed. The module should be replaced with a configured
backup.
Blinking Green
The LED blinking green indicates that the module has detected
an error in configuration when attempting to go from configure
to execute mode. The module status bytes can be monitored to
identify the configuration error (refer to Table
The LMM also enters this error mode if an NVRAM error occurs
while in execute mode. In this case the LMM continues to oper-
ate unless an additional error condition causes it to halt. The
