How can I set maintenance tasks to be performed together in BlockSim?
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In previous versions of BlockSim, item group numbers allowed you to assign blocks to a group so that their maintenance would be performed together. In the Synthesis version, maintenance groups allow you to do this plus a great deal more.
A maintenance group is a set of blocks where some event within the group can trigger either a state change or maintenance for other block(s). You can use a maintenance group:
To turn a block on or off. State change triggers are used to activate or deactivate a block when items in the specified maintenance group(s) go down or are restored.
The next figure shows a very simple example of how maintenance groups and state change triggers can be used to model a cold standby configuration. In this example:
- Block B starts out as the active component. It belongs to the "B Maintenance" maintenance group.
- Block C starts out as the standby (dormant) component. It is initially set to be off, but it has a state change trigger set so that if any item from the "B Maintenance" maintenance group goes down, Block C is activated.
- Thus, if Block B fails, Block C will be turned on.
To trigger a scheduled maintenance task. You can set a maintenance task to be performed based on events in one or more maintenance groups. Triggering events within the maintenance group can include a block failing, a maintenance task starting and/or a block being restored.
For example, in the figure shown next, a preventive task has been defined for Block D. This task is scheduled to be performed whenever any item from the "B Maintenance" maintenance group fails. Thus, if Block B fails, preventive maintenance will be performed on Block D.
A similar approach can be used to model simultaneous maintenance, as illustrated in the following figure. In this example, both Block F and Block H belong to "Maintenance Group W." Each block has a preventive task that is scheduled to be performed upon the start of corrective maintenance within Maintenance Group W. Thus, if either Block F or Block H receives corrective maintenance (to restore the item after a failure), then the other block will receive preventive maintenance (to reduce the likelihood that a failure will occur).