196 Replacing Modules
Trident Planning and Installation Guide
Replacing a Main Processor Module
If the fault indicator of an MP Module light is blinking, the diagnostics have
detected a module failure.
Before replacing an MP, verify that all I⁄O modules are locked.
!
CAUTION
After replacing an MP, allow the module to fully re-educate before unlocking
another MP. Never unlock more than one MP at a time.
▼ To replace a faulty MP:
1
If available, make a note of the diagnostic message, model, and serial numbers.
2 Before replacing an MP Module, observe the important instructions provided in
the section called “Guidelines for Replacing Modules” on page 195.
3 If the controlled process is online, verify that at least one MP Module has an
Active indicator with a blinking yellow light.
4 On the faulty MP Module, rotate the lock lever counter-clockwise until the
module ejects from the baseplate.
5 Insert the replacement MP Module and rotate the lock lever clockwise to draw
the module into the baseplate.
Note When replacing a module, you must use a #2 flat-blade screwdriver to lock
or unlock the module. See the “Installing Modules” procedure on page 148.
The Pass indicator should go on and stay on within one to six minutes.
The Active indicator on the replacement MP Module blinks at the same rate as
the other MPs within one to six minutes.
If the module is not properly seated, the Lock indicator stays on. The Active
indicator does not go on until the MP Module is properly seated and locked.
6 Contact the Triconex Customer Response Center to obtain a returned material
authorization (RMA) number.
7 Return the module to Triconex for repair.
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