Siemens SITRANS P DS III Operating Instructions Manual page 250

Glossary
Final controlling element
Converter that converts electric signals into mechanical or other non-electric variables.
Firmware
Firmware is a type of software that is embedded in a chip in electronic devices in contrast to
software proper that is stored on hard disks or other media. Today, firmware is usually stored
in a flash memory or EEPROM.
The firmware usually contains elementary functions for controlling the device or input and
output routines.
Frequency shift keying
Frequency shift keying is a simple modulation method in which the digital values 0 and 1 are
represented by two different frequencies.
Frequency shift keying (FSK)
Frequency shift keying
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Function block
A named block consisting of one or more inputs, outputs, and included parameters.
Function blocks represent the basic automation functions executed by an application in a
way as independent as possible from the details of I/O devices and the network. Each
function block processes input parameters using a specified algorithm and a set of internally
stored parameters. They produce output parameters which are available for use inside the
same function block application or by other function block applications.
Generic Station Description
The generic station description (GSD) contains the information necessary for the control
system to establish communication.
GSD
Generic Station Description
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Link
is a coupler with a variable transmission speed. The transmission speed is a maximum of
12 Mbps (DP) to 31.25 kbps (PA).
Non-volatile memory
EEPROM
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SITRANS P DS III with PROFIBUS PA
Operating Instructions, 06/2013, A5E00053276-07