© Siemens AG 2011
Introduction
Increase in productivity through intelligent maintenance
How can the productivity of a plant with a high level of au- tomation be increased even further?
Plant operators in all sectors consider increased availabili- ty and shorter downtimes to be the most effective lever to- ward increasing productivity. Investigations have shown that downtimes are frequently the result of insufficient maintenance – despite the fact that maintenance is alrea- dy a significant portion of the lifecycle costs.
Intelligent maintenance strategies can make a significant con- tribution toward increasing productivity:
•Failures can be prevented by monitoring the current plant condition.
•Maintenance can then be planned. It does not wait until a fault has occurred, but implements appropriate measures in advance for avoiding faults. The timing of maintenance can be planned such that the existing resources can be used optimally.
•Innovative maintenance strategies pay for themselves twice: planning security and the specific application of me- thods reduces the direct maintenance costs.
•Plant availability is increased at the same time. This means that consequential costs resulting from failures, such as quality deficiencies or loss of image, are reduced.
Totally Integrated Automation supports intelligent mainte- nance strategies. The SIMATIC Maintenance Station is of signi- ficant importance, and presents the information relevant to maintenance from all automation components in a uniform and clear manner, thus providing the maintenance engineer with valuable support for making decisions.
Maintenance strategies
There are two maintenance strategies: response to failures or taking preventive measures. In the case of
The objective of preventive strategies is to carry out mainte- nance measures before faults even occur, in order to avoid possible downtimes. This strategy can be satisfied using
Benefits of intelligent maintenance
Continuous plant monitoring
■Reduces the risk of failures, and increases the availability
■Enables maintenance to be planned
Optimized use of maintenance resources
■Increases maintenance quality
■Achieves cost savings
The potential for savings arises
■During maintenance itself and
■by avoiding consequential costs
Condition Monitoring, that is to say status monitoring, aims to detect imminent faults at an early stage. It provides infor- mation on the remaining duration of use. In the case of con-
It has been shown in practice that optimum results can be achieved through intelligent combination of the different stra- tegies.
Maintenance
Corrective | Preventive |
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Maintenance strategies
