Specifications

Glossary

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function code A function code is an instruction set commanding 1 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.

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.

I/O base A mounting device, designed to seat an Advantys STB I/O module, hang it on a DIN

rail, and connect it to the Island bus. It provides the connection point where the

module can receive either 24 VDC or 115/230 VAC from the input or output power

bus distributed by a PDM.

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