INTRODUCTION
I-E96-309A
5 - 1
SECTION 5 - TROUBLESHOOTING
INTRODUCTION
This section explains the error indications and corrective
actions for the Digital Slave Module (IMDSM05).
ERROR MESSAGES AND CORRECTIVE ACTION
You can obtain the status of the DSM by checking the master
module for good quality on its input blocks. Use any Infi 90
operator interface (e.g. Operator Interface Station, Engineering
Work Station, Configuration and Tuning Terminal) to do this.
NOTE: If you look at the DSM front panel input status LED indica-
tors and none are lit, may indicate a faulty DSM (an input or output
must be energized to light an LED). Check the master module for
bad quality on its input blocks.
MASTER MODULE ERRORS
The address set on address switch and in the master module
configuration must be the same. The master module will gener-
ate a MISSING SLAVE MODULE error if they do not match.
Verify that the address set on S1 is the same as the address in
Function Code (FC) 84 specification 1. If not:
1. Remove the module and change the setting of S1 to corre-
spond with the module configuration (refer to the Installation
section for the procedures to set an address and to install a
slave module)
OR
2. Modify the address in the module configuration (FC 84
specification 1) to correspond with the address set on S1. Use
an Infi 90 operator interface to modify the configuration (for
procedures on how to modify a function code specification,
refer to the product instruction for the operator interface you
are using).
The master module will generate a MISSING SLAVE MODULE
error if the slave expander bus is not connected between the
slave module and the master module. Verify the bus connec-
tion on the MMU back plane.
NOTE: The master module will trip when the DSM module fails if FC
84 specification 3 is set to 0. Changing specification 3 to a 1 will
cause the master module to operate when a slave fails.