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EB 8389-1S EN 107

Appendix

17.3 Diagnostic data points saved in a non-volatile memory

Data saved in a non-volatile memory

Saved directly after they change Saved cyclically every 24 h

Monitoring − Status classication

− Alarm settings

− Logging

Data logger Diagnostic parameters

Valve signature − Diagnostic parameters

− Manufacturer reference

− Process reference

Measured values

Long-term monitoring

Sound level(x)

On/off valve Reference assessment Assessment

Valve position x histogram Diagnostic parameters Measured data in histogram

Set point deviation e

histogram

Diagnostic parameters Measured data in histogram

Cycle counter histogram Measured data in histogram

Lower end position Measured values

Valve dead band

Partial stroke test (PST) − Diagnostic parameters

− Test cancelation conditions

− Δp out reference value

− Course of step response

− Measured data assessment

− Number of tests

Full stroke test (FST) − Diagnostic parameters