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Fingerprint
Numerical value generated by the device when you start safety validation via the "Functional
Safety" wizard. By comparing the fingerprint, you determine whether or not the device and
the safety-related parameters have changed erroneously during activation of the functional
safety.
Firmware
Firmware (FW) is software that is embedded on a chip in electronic devices – in contrast to
software which is saved on hard disks, CD-ROMs or other media. These days, firmware is
mostly stored in a flash memory or EEPROM.
Firmware usually contains the elementary functions for controlling the device, as well as input
and output routines.
Frequency shift keying
Frequency shift keying is a simple form of modulation, where the digital values 0 and 1
modulate the actual current signal by means of two different frequencies.
Frequency Shift Keying (FSK)
HART
HART (Highway Addressable Remote Transducer) is a standardized, widely used
communications system used to structure industrial fieldbusses. The communications system
provides digital communications for multiple participants (field devices) via a common databus.
HART is based especially on the equally widely used 4/20 mA standard for the transfer of
analog sensor signals. The cabling from existing older systems can be used directly and both
systems operated in parallel.
HART specifies several protocol levels in the OSI model. It facilitates the transfer of process
and diagnostics data and control signals between field devices and high-level control systems.
Standardized parameter sets can be used for the manufacture-independent operation of all
HART devices.
Typical applications include transmitters for measuring mechanical and electrical dimensions.
Non-volatile memory
Risk
Combination of the probability of damage occurring and the extent of the damage.
Glossary
SITRANS P320/P420 (mA/HART)
254
Operating Instructions, 06/2018, A5E44852162-AA
Содержание SITRANS P320
Страница 10: ...Table of contents SITRANS P320 P420 mA HART 10 Operating Instructions 06 2018 A5E44852162 AA ...
Страница 18: ...Introduction 2 7 Notes on warranty SITRANS P320 P420 mA HART 18 Operating Instructions 06 2018 A5E44852162 AA ...
Страница 174: ...Functional Safety 10 7 Repair and service SITRANS P320 P420 mA HART 174 Operating Instructions 06 2018 A5E44852162 AA ...
Страница 260: ...Index SITRANS P320 P420 mA HART 260 Operating Instructions 06 2018 A5E44852162 AA ...