Rockwell Automation AADvance Controller Troubleshooting and Maintenance Manual - Manual (Page 77)

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Document: 553634
(ICSTT-RM406F_EN_P) Issue: 089:
6-17
maximum interval between these tests shall be defined before installation. It is highly recommended
the test interval be less than the Proof Test Interval used to calculate the PFD values.
Field Device Maintenance
The Operation and Maintenance Plan shall include field maintenance activities, such as re-calibration,
testing and replacement of devices, which were specified by the system design requirements.
In general, adequate provision for these measures will be defined by the client. As long as the necessary
maintenance overrides and other facilities are implemented, no further safety requirements will be
needed.
It is highly recommended the I/O forcing capability is NOT used to support field device maintenance.
Should I/O forcing be used to support field device maintenance, the requirements defined for 'Input
and Output Forcing' in this manual shall be applied.
Module Fault Handling
When the AADvance controller uses modules in a dual or triple redundant configuration, the
controller can continue to operate if one of its modules should develop a fault. However, when a
module does have a fault it should be replaced as recommended in the Safety Manual (all modules
allow live removal and replacement in redundant configurations) to ensure that faults do not
accumulate and that multiple failure conditions result in a plant shutdown.
On-site repair is not supported except for the replacement of fuses within some termination
assemblies. All failed modules should be returned for repair or fault diagnosis in accordance with the
warranty and return policy documentation delivered with your system.
Monitoring
To ensure that the safety objectives are met through the lifetime of the system it is important to
maintain records of all faults, failures and anomalies as they occur. This requires the maintenance of
records by both the end-user and the System Integrator. It is highly recommended the following
information is included:
 Description of the fault, failure or anomaly
 Details of the equipment involved, including module types and serial numbers
where appropriate
 When the fault was experienced and any circumstances leading to its occurrence
 Any temporary measures implemented to correct or work around the problem
 Description of the resolution of the problem and reference to remedial action
plans and impact analysis
You should define the procedure for field returns, and repair and defect handling. The information
requirements placed on the end user because of this procedure should be clearly documented and
provided to the end user. The defect handling procedure shall include: