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(D) Maintenance and Testing
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SCADA systems shall be maintained and tested in accordance with (D)(1) and (D)(2).
The maintenance program for SCADA systems shall consist of the following components:
- A documented preventive maintenance program
- Concurrent maintenance capabilities, to allow the testing, troubleshooting, repair, and/or replacement of a component or subsystem while redundant component(s) or subsystem(s) are serving the load
- Retention of operational data — the deleted material goes well beyond requirements to ensure proper maintenance and operation
SCADA systems shall be tested periodically under actual or simulated contingency conditions.
Informational Note No. 1: Periodic system testing procedures can duplicate or be derived from the recommended functional performance testing procedures of individual components, as provided by the manufacturers.
Informational Note No. 2: For more information on maintenance and testing of SCADA, see NFPA 70B-2013, Recommended Practice for Electrical Equipment Maintenance.
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