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- Schneider
- HMISTO715
- Touch Panel Screen
- France
- 90.4 × 124.9 × 38.8 mm
- 0.22 kg
- Xiamen, China
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Product Overview
The Schneider HMISTO715 Harmony STO & STU Touch Panel Screen is a compact human-machine interface (HMI) terminal for machine operation, process visualization and operator interaction. It features a 4.3-inch color TFT display with a 480 × 272 pixel resolution and a resistive touchscreen. The terminal runs applications developed with EcoStruxure Operator Terminal Expert.
The HMISTO715 is particularly suited to compact machines where operators need to monitor process values, acknowledge alarms, enter settings or control operating sequences from a local panel. Typical examples include packaging equipment, small assembly machines and material-handling systems where a full-size industrial HMI would be unnecessary.
Its communication configuration distinguishes it from other HMISTO7 models. The HMISTO715 uses an RJ45 serial connection supporting RS-232C/RS-485 communication and does not have the Ethernet port provided on the HMISTO735. This makes the choice of model important when matching the HMI to an existing PLC or machine controller.
For a machine builder replacing an older operator terminal, the main considerations are the communication protocol, application software, screen layout and controller compatibility. The HMISTO715 can display graphical operating pages, process variables, alarm information and operator controls, provided the application is configured for the connected automation equipment.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Schneider Electric |
| Model / Part Number | HMISTO715 |
| Product Family | Harmony STO & STU |
| Product Type | Touch Panel Screen |
| HMI Category | Human-Machine Interface |
| Display Size | 4.3 inch |
| Display Type | Color TFT LCD |
| Display Resolution | 480 × 272 pixels |
| Display Colors | 65,536 colors |
| Touchscreen Type | Analog resistive touchscreen |
| Software Designation | EcoStruxure Operator Terminal Expert |
| Operating System | Harmony |
| Rated Supply Voltage | 12–24 V DC |
| Power Consumption | 7.5 W |
| Serial Communication | RS-232C / RS-485 |
| Serial Connector | RJ45 |
| USB Interfaces | 1 × USB Type-A host; 1 × USB Mini-B device |
| Supported Protocols | Modbus and supported third-party protocols |
| Application Memory | 26 MB |
| Backup Memory | 512 KB |
| Backlight Lifespan | 50,000 hours |
| Protection Rating | IP65 / NEMA 4X for the applicable front-panel installation |
| Dimensions | 90.4 × 124.9 × 38.8 mm |
| Weight | 0.22 kg |
Product Features
- 4.3-inch color touchscreen: Displays machine status, operating values, alarms and graphical control elements.
- 480 × 272 resolution: Supports landscape-oriented HMI pages for compact machine interfaces.
- RS-232C/RS-485 communication: Connects to compatible controllers through the terminal’s RJ45 serial interface.
- EcoStruxure Operator Terminal Expert: Provides the application development environment for configuring screens and operator functions.
- Modbus support: Enables communication with compatible automation equipment using the appropriate configuration.
- USB connectivity: Provides host and device connections for supported peripheral and engineering tasks.
- Resistive touch operation: Accepts operator input through the touchscreen.
- Compact panel integration: Fits machine interfaces where control-panel space is limited.
- Front-panel protection: Supports installation in suitable industrial environments when mounted according to the specified requirements.
Working Principle
The HMISTO715 operates as the operator-facing interface between a machine and its control system. Its HMI application organizes information into screens containing numerical values, status indicators, alarm messages, buttons and other graphical objects.
During operation, the terminal exchanges data with a compatible PLC or controller through its configured serial communication interface. The HMI reads the variables required for display and sends operator commands or entered values back to the controller where the application permits those actions.
Consider a packaging machine with a conveyor, product sensor and sealing mechanism. The HMISTO715 can display the current operating mode, production count and fault messages while providing controls for authorized operators. When an operator changes a permitted setting, the HMI communicates the new value to the controller, which executes the corresponding machine logic.
The HMI does not directly replace the PLC’s control program. Interlocks, motor control, safety functions and machine sequencing remain the responsibility of the associated control architecture. The HMI provides the visual interface through which operators observe and interact with those functions.
Communication depends on the serial settings, selected protocol, PLC configuration and application variables. Incorrect addressing, mismatched communication parameters or an unsuitable driver can prevent the terminal from displaying current data even when the touchscreen itself is functioning normally.
Role in a Harmony STO Machine Control System
The HMISTO715 serves as the local visualization and operator-command terminal. It works with the machine controller and connected field devices rather than controlling the complete process independently.
Operator Input → HMISTO715 HMI Application → RS-232C / RS-485 Communication → PLC or Controller → Machine Equipment
| System Component | Function | Relationship to the HMISTO715 |
|---|---|---|
| HMISTO715 Touch Panel Screen | Displays operating information and accepts operator input | Provides the local machine interface |
| PLC or Machine Controller | Executes logic, sequencing and control operations | Exchanges process variables and commands with the HMI |
| Serial Communication Cable | Carries data between the HMI and controller | Connects through the configured RJ45 serial interface |
| RS-232C / RS-485 Interface | Provides the physical serial communication link | Must match the controller’s supported interface |
| Modbus or Other Supported Protocol | Defines data exchange between devices | Must be configured consistently at both ends |
| EcoStruxure Operator Terminal Expert | Develops and configures the HMI application | Defines screens, variables and operator functions |
| Sensors and Transmitters | Provide machine or process measurements | Supply data to the controller for HMI display |
| Drives and Motor Starters | Operate motors and related equipment | Receive control commands through the machine control system |
| Alarm Logic | Detects and reports abnormal operating conditions | Supplies alarm information displayed by the HMI |
| USB Engineering Connection | Supports applicable application transfer and maintenance tasks | Used for supported engineering operations |
Industrial Applications
| Application | Typical Equipment | Role of the HMISTO715 |
|---|---|---|
| Packaging Machinery | Filling, sealing and labeling machines | Displays production status, operating modes and alarms |
| Assembly Automation | Small assembly and fastening stations | Provides operator prompts and machine controls |
| Material Handling | Conveyors and transfer equipment | Displays operating states and supports permitted commands |
| Food Processing Equipment | Compact preparation and packaging machines | Presents process values and operating instructions |
| Machine Tools | Auxiliary machinery and compact automated stations | Provides local status visualization and operator input |
| Test Equipment | Automated inspection and functional-test stations | Displays test status and operator selections |
| Industrial Utilities | Small pumping and ventilation control systems | Presents operating information and alarm states |
| OEM Machinery | Purpose-built machines using compatible PLCs | Supplies a dedicated interface for the machine application |
Installation and Maintenance
- Verify the model number: Confirm that HMISTO715 is the required terminal, particularly when replacing another HMISTO7 model with a different communication interface.
- Check the panel cutout: Match the mounting opening and panel thickness to the specified installation dimensions and mounting arrangement.
- Confirm the power supply: Provide a compatible 12–24 V DC supply and verify polarity and wiring before energizing the terminal.
- Match the serial interface: Determine whether the controller uses RS-232C or RS-485 and select the corresponding wiring arrangement.
- Configure communication parameters: Set the protocol, baud rate, addressing and other required serial parameters consistently with the connected controller.
- Prepare the HMI application: Develop or verify the application in EcoStruxure Operator Terminal Expert and confirm that the project matches the installed terminal.
- Check controller variables: Verify that the PLC addresses and data types used by the HMI correspond to the actual controller program.
- Inspect the connectors: Check the RJ45 serial connection, USB ports and power terminals for damage or loose connections.
- Secure the terminal: Install the unit using the specified mounting method and ensure that the panel installation maintains the required front protection.
- Transfer and test the application: Load the approved project using a supported transfer method, then check screen navigation and data updates.
- Verify operator functions: Test buttons, numerical entries, alarm acknowledgments and other configured functions under controlled conditions.
- Record maintenance findings: Document the HMI model, application revision, communication settings and any changes made during servicing.
Compatible System Components
| Component | Function | Compatibility Consideration |
|---|---|---|
| Schneider Electric PLC | Executes machine logic and processes I/O | Verify supported serial communication and controller protocol |
| Modbus-Compatible Controller | Exchanges process data with the HMI | Match the protocol settings and data mapping |
| RS-232C Serial Cable | Provides a point-to-point serial connection | Confirm wiring and connector assignments |
| RS-485 Serial Network | Supports serial communication with compatible devices | Verify network topology, addressing and termination where required |
| EcoStruxure Operator Terminal Expert | Develops the HMI project | Use a compatible software version and target configuration |
| USB Host Peripheral | Supports applicable USB functions | Confirm that the peripheral and HMI application support the intended task |
| USB Engineering Connection | Supports supported application-transfer operations | Follow the terminal’s applicable transfer procedure |
| Machine Sensors | Supply measurement and status signals | Signals are normally processed by the controller before HMI display |
| Motor Drives | Control motor speed and operation | Integrate through the machine controller or a supported communication arrangement |
| Panel Power Supply | Provides DC power to the terminal | Match the specified voltage range and electrical requirements |
Recommended Related Models
| Model / Product | Product Type | Relationship | Selection Consideration |
|---|---|---|---|
| Schneider HMISTO705 | Harmony STO & STU Touch Panel Screen | Related 4.3-inch model with an RS-232 serial configuration | Consider when the application requires the corresponding serial interface |
| Schneider HMISTO735 | Harmony STO & STU Touch Panel Screen | Related 4.3-inch model with Ethernet communication | Consider when the controller connection requires Ethernet rather than the HMISTO715 serial interface |
| Schneider HMISTU655 | Harmony STO & STU Touch Panel Screen | Related compact HMI with a 3.5-inch display | Compare display size, mounting arrangement and communication requirements |
| Schneider HMISTU855 | Harmony STO & STU Touch Panel Screen | Related STU model with a 5.7-inch display | Consider when a larger display and the corresponding STU interfaces are required |
| Schneider HMISTO715 | Harmony STO & STU Touch Panel Screen | Requested model | Use the complete model reference when matching the serial communication configuration |
Key Advantages
- Provides a local touchscreen interface for compact industrial machines.
- Supports RS-232C and RS-485 serial communication.
- Displays process variables, operating states and alarms through a configured HMI application.
- Uses EcoStruxure Operator Terminal Expert for application development.
- Supports integration with compatible PLCs and Modbus-based control systems.
Technical FAQs
What distinguishes the HMISTO715 from the HMISTO735?
The main distinction is the communication interface. The HMISTO715 uses an RS-232C/RS-485 serial connection, while the HMISTO735 provides Ethernet connectivity. The appropriate model depends on the controller interface and the machine’s communication architecture.
Which software is used to develop an HMISTO715 application?
The HMISTO715 uses EcoStruxure Operator Terminal Expert. The project must target the appropriate terminal and use compatible communication drivers, variable definitions and screen configurations.
Why might the HMISTO715 display a screen but fail to update PLC values?
The display can operate even when communication with the controller is unsuccessful. Check the selected serial interface, cable wiring, communication parameters, protocol configuration, PLC address mapping and application settings.
Does the HMISTO715 execute machine safety interlocks?
No. The HMI provides operator visualization and input, while safety interlocks and machine-control logic must be implemented in the appropriate control and safety equipment. HMI buttons should not be treated as a substitute for safety-rated functions.