Installation guide

Glossary

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890USE17100 September 2003

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 in

operation.

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 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.

I/O module In a programmable controller system, an I/O module interfaces directly to the

sensors and actuators of the machine/process. This module is the component that

mounts in an I/O base and provides electrical connections between the controller

and the field devices. Normal I/O module capacities are offered in a variety of signal

levels and capacities.

I/O scanning The continuous polling of the Advantys STB I/O modules performed by the COMS

to collect data bits, status, error, and diagnostics information.

IEC International Electrotechnical Commission Carrier. Founded in 1884 to focus on

advancing the theory and practice of electrical, electronics, and computer

engineering, and computer science. IEC 1131 is the specification that deals with

industrial automation equipment.

IEC type 1 input Type 1 digital inputs support sensor signals from mechanical switching devices such

as relay contacts and push buttons operating in normal environmental conditions.