NPBU-42C Spare parts for ABB drive of fiber board PPCs branch unit

NPBU-42C Spare parts for ABB drive of fiber board PPCs branch unit

NPBU-42C Spare parts for ABB drive of fiber board PPCs branch unit

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This subsection contains information on how to maintain the required SIL of each

safety instrumented function during the operation period.

Operation and Maintenance Planning

Operation and maintenance planning for the SIS shall be carried out, this

requirement ensures that functional safety continues beyond the design, production,

installation and commissioning of the system. Guidance and procedures shall be

provided to enable the organization responsible for Operation and Maintenance to

maintain the intended safety levels of the safety instrumented functions.

The Operation and maintenance plan shall include:

? Start-up and shutdown procedures of the process

? Procedures for normal operation

? Maintenance activities for sensors, actuators and other field devices

? Maintenance activities for the SIS

? Allocation of responsibilities for the various tasks

Operation Procedures

Procedures shall be established to secure safe operation of the SIS under all process

conditions and states.

As described in chapter Access Management Settings on page 108, the operator’s

possibility to change values in an AC 800M HI can be configured to fit the operation

philosophy of the plant. The configured behavior of the system shall be reflected in

the operation procedures.

The utilization of the Access Enable key switch and the Reset all Forces panel

button as described in Physical I/O for Operator and Maintenance Personnel

Interaction on page 70 shall be reflected in the operation procedures.

All operations on an object in a SIL application, shall be confirmed by the operator

by selecting yes in the Confirm Operation dialog, see Figure 6 below.