home automation and HMI

Vocabulary flashcards covering core definitions, operating modes, design configurations, PLC I/O mappings, and ladder logic rules for Human Machine Interfaces (HMIs).

Human Machine Interface (HMI)

Any interface that permits interaction between a human and a machine in order to control or monitor a process.

Operator Machine Interface (OMI)

An alternative industry term for a Human Machine Interface (HMI).

Man Machine Interface (MMI)

An alternative industry term for a Human Machine Interface (HMI).

Role of HMI

To provide interpretation of raw PLC data and add value, converting simple numerical data (such as Output Y01 ON) into meaningful information (such as 'The discharge pump is running').

Design / Configuration Mode

An operational mode of an HMI that allows the user to create and design display screens.

Runtime Mode

An operational mode of an HMI that displays the screens and populates them with real-time operational information.

Static Objects

HMI application objects that form the screen background or provide fixed data displays.

Dynamic Objects

HMI application objects that can be animated to present changing process data.

HMI Runtime Tasks

The three sequential operations executed in runtime mode: 1. Get data from the PLC (via driver/protocol/cable); 2. Store data in the HMI internal storage area; 3. Use data to update screen dynamic fields.

PLC Analogue Devices

PLC devices such as timers and counters whose data values can be numbers other than 0 and 1.

PLC Digital Devices

Binary PLC devices (such as inputs and outputs) whose data values are strictly 0 or 1.

Affordance

A technical term used to describe the way in which an object's appearance suggests its intended purpose (e.g., a box/border drawn around changing dynamic text to reinforce that it needs to be monitored).

Touch Key

A defined field on an HMI screen that reacts to an operator action, such as executing a momentary command to set a tag.

Start Conditions Rule

The ladder programming rule specifying that all start conditions (e.g., physical push button X3, contactor run feedback X10, and HMI start tag M10) must be placed in parallel.

Stop Conditions Rule

The ladder programming rule specifying that all stop conditions (e.g., physical stop button X2 and HMI stop tag M11) must be placed in series.

Tag M10

An HMI I/O tag assigned to a momentary touch field labeled START to trigger conveyor start via ladder logic.

Tag M11

An HMI I/O tag assigned to a momentary touch field labeled STOP to trigger conveyor stop via ladder logic.

Input X0

PLC input connected to the auxiliary O/L RELAY; indicates Inactive when OFF and OVERLOAD when ON.

Input X1

PLC input connected to the auxiliary EMERGENCY STOP; indicates Inactive when OFF and E-STOP when ON.

Input X2

PLC input connected to the STOP PB (normally closed); indicates STOP when OFF and Inactive when ON.

Input X3

PLC input connected to the START COUNTER RESET / Start PB (normally open); indicates Inactive when OFF and START when ON.

Input X10

PLC input providing MOTOR RUN FB (feedback); indicates STOPPED when OFF and RUNNING when ON.

Output Y2

PLC output connected to the MOTOR CONTACTOR (Cont KM1); indicates STOP when OFF and RUN when ON.

Output Y4

PLC output connected to the EJECT SOLENOID; states are RETRACT / 'retracted' when OFF and EXTEND / 'extended' when ON.

Counter C0

The PLC counter signal linked to the dynamic Analogue Numeric field on the HMI to display the reject product count (configured with 3 or more positions and 0 decimals).

E1043

The specific HMI terminal model noted in the lecture where the red lamp graphic appears black.