Schneider Electric 890USE17700 - Manual (Page 178)

Glossary
178 890USE17700 April 2004
function block A function block performs a specific automation function, such as speed control. A
function block comprises configuration data and a set of operating parameters.
function code A function code is an instruction set commanding one or more slave devices at a
specified address(es) to perform a type of action, e.g., read a set of data registers
and respond with the content.
gateway A program or /hardware that passes data between networks.
global_ID global_identifier. A 16-bit integer that uniquely identifies a device’s location on a
network. A global_ID is a symbolic address that is universally recognized by all other
devices on the network.
GSD generic slave data (file). A device description file, supplied by the device’s
manufacturer, that defines a device’s functionality on a Profibus DP network.
HMI human-machine interface An operator interface, usually graphical, for industrial
equipment.
HMI human-machine interface An operator interface, usually graphical, for industrial
equipment.
hot swapping Replacing a component with a like component while the system remains
operational. When the replacement component is installed, it begins to function
automatically.
HTTP hypertext transfer protocol. The protocol that a web server and a client browser use
to communicate with one another.
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