INTRODUCTION
WBPEEUI240754A0
5 - 1
SECTION 5 - TROUBLESHOOTING
INTRODUCTION
This section explains the error indications and corrective
actions for the IMDSO15 Digital Output (DSO) module.
ERROR INDICATIONS AND CORRECTIVE ACTION
You can obtain the status of the DSO module through an
INFI 90 OPEN operator interface (e.g., Operator Interface Sta-
tion, Engineering Work Station, Configuration and Tuning Ter-
minal) or the front panel status LED indicators.
NOTE: If you look at the DSO module front panel relay output status
LED indicators and none are lit, this may indicate a faulty DSO (a
relay must be energized to light an LED). Check the control module
for bad quality on its output blocks.
Module Status LEDs
The two front panel status LEDs have three states to indicate
normal operation and error conditions. Table
lists DSO
status LED states, error indications, probable causes and cor-
rective actions.
NOTE: If the corrective actions in Table
do not correct a prob-
lem with the DSO module, replace it.
Table 5-1. Status LED Indications and Corrective Actions
LED State
Indication
Probable Cause
Corrective Action
Red OFF/
Green ON
Digital output module
operating normally and
communicating with
control module
Normal operation
No action required
Red OFF/
Green OFF
Digital output module
not enabled
Address set on switch S1
not the same as address in
control module configura-
tion FC 83, S1
Change address on S1 switch to
match FC 83, S1
OR
Change address in FC 83, S1 to
match S1 switch setting
Dipshunt not properly
installed between control
module and digital output
module
Verify dipshunt is installed properly
(no bent pins) in I/O expander bus
socket on MMU backplane
between control and digital output
module
