Rockwell Automation MHB44IND Pulse Input and Analogue Output Module - Manual (Page 16)

16 MHB44IND October 2005 – Issue 2
Triguard SC300E
SERVICING
SCOPE
System repair is by module replacement. Faulty modules are not repairable in the field. They
should be replaced by new modules and returned for repair.
CAUTION 1
Before fitting a new module ensure that all the link setting are the same as that on the old
module.
CAUTION 2
The module contains components that may be electrostatically sensitive, it should be
transported and stored in its original packaging material.
DIAGNOSIS
The TriBuild workstation is used for fault diagnosis. In the case of an Input/Output fault, the
Health indicator on the faulty module will be extinguished.
PREPARATION
Use one of the following methods to ascertain whether the chassis I/O slot containing the
faulty module has been allocated a hot repair partner:
• Check the system drawings
• Check the chassis wiring configuration
• Use the I/O Chassis Configuration report on the TriBuild workstation.
Where there is a hot repair partner allocation, use the ‘Dual-slot hot repair’ procedure.
Otherwise use the ‘Single-slot hot repair’ procedure.
CONFIGURATION
Before fitting a new module ensure that all the link setting are the same as that on the old
module.
CAUTION 3
Registers must be initialised to 100 Hex, 256 Decimal.
Ladder logic must be used to prevent a value of less than 256 being written to the outputs or
the module will lose health indication.