Deltapilot S FMB70 Commissioning (installation and configuration)
Endress+Hauser 11
3.4.3 Restrictions for safety-related operation
• Device warm-up time: after device warm-up, the safety functions are available after a
30 Sekunden initialization period.
• If the device is operated locally without a display and without an operating tool or
without a HART communicator, it cannot be safely configured because the user cannot
perform a visual check. In both these situations, communication via HART alone is not
sufficient.
• The device must be locked after parameter configuration.
• When the device is used as a subsystem of a safety function, the "Hold measured value"
setting in the "Output fail mode (388)" parameter and the Multidrop mode may not be
selected as this option does not guarantee a failsafe alarm.
• A complete function test of the safety-related functions must be carried out during
commissioning.
• The maximum interval for proof testing (proof test interval) is 5 Jahre.
• Faulty devices must be replaced as soon as possible to minimize the possibility of
multiple errors occurring. The failure probabilities indicated in this Functional Safety
Manual are based on a medium time to repair (MTTR) of 8 Stunden.
3.5 Dangerous undetected failures in this scenario
An incorrect output signal that deviates from the real measured value by more than 1 %,
but is still in the 4 to 20 mA range, is considered a dangerous, undetected failure.
3.6 Useful lifetime of electric components
The established failure rates of electrical components apply within the useful lifetime as
per IEC 61508-2:2010 section 7.4.9.5 note 3.
According to DIN EN 61508-2:2011 section 7.4.9.5 (national footnote N3) appropriate
measures taken by the operator can extend the useful lifetime.
4 Commissioning (installation and
configuration)
4.1 Requirements for personnel
The personnel for installation, commissioning, diagnostics and maintenance must fulfill
the following requirements:
‣
Trained, qualified specialists must have a relevant qualification for this specific function
and task.
‣
Personnel must be authorized by the plant owner/operator.
‣
Be familiar with federal/national regulations.
‣
Before starting work: personnel must read and understand the instructions in the
manual and supplementary documentation as well as the certificates (depending on
the application).
‣
Personnel must follow instructions and comply with general policies.
The operating personnel must fulfill the following requirements:
‣
Personnel are instructed and authorized according to the requirements of the task by
the facility's owner-operator.
‣
Personnel follow the instructions in this manual.
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