SCHNEIDER Magelis range Graphic XBT-F / TXBT-F Instruction Manual

Command and Status: The dialogue table contains commands sent by the PLC to the terminal (such as display page, lock button, request field input, print) as well as the status feedback from the terminal to the PLC (such as terminal mode, current display page, key mapping, timestamp, alarm confirmation status).

Security mechanism: The dialogue table contains an "authorization word", and the PLC must write a specific value specified by XBT-L1000 before the terminal can execute the write command and dialogue table processing, providing critical security for the system.

Alarm processing: The alarm is triggered by the word bits in the PLC, which form the alarm table and are part of the dialogue table. The terminal can handle alarms from multiple PLCs and support functions such as group management, priority sorting, and forced confirmation.

Application Development Process and XBT-L1000 Software

Developing a robust Magelis application requires a systematic approach. XBT-L1000 V3. x, as the core development tool, runs on Windows 95/NT environment and provides graphical interface, online help, and simulation functions.

Requirement analysis and specification definition: Clarify user requirements for production monitoring, control, and maintenance, determine dialogue architecture, data exchange volume, and network topology.

System architecture and communication definition: Determine the communication protocol (such as Unitelway, Modbus, Fipway, etc.) and the list of devices accessible to the terminal based on the control system architecture.

Command and page design: Define commands from the terminal to the control system (operator action mode) and commands from the control system to the terminal (page call, LED display, etc.). Design all pages based on requirements, specifying their purpose, type, and data to be processed.

Dialogue table design: Based on the above analysis, determine all the words required for the dialogue table. It is recommended to complete it before writing the PLC program to avoid structural modifications.

Template and page creation: Use template pages to unify the interface style. Create application pages, alarm pages, help pages, and navigate through function keys or PLC variable configuration pages. Pages and fields can be protected with passwords (level A, B, C) to achieve hierarchical access control.

Alarm and Help Definition: Define the device that triggers the alarm, alarm grouping, priority, printing/recording/display/confirmation requirements. Create a help page and associate it with an application page or alarm page.

Translation and configuration: The application supports up to 3 language translations. Configure terminal parameters such as default startup page, date and time format, printer settings, etc.

Simulation, saving, and transmission: Use software simulation functions to test application logic, and then save the project. Transfer application programs and protocols to the terminal via serial port cable (XBT-Z915) or network (TXBT).

Terminal Operations and System Management

The terminal has three working modes: application transmission mode (communicating with XBT-L1000), operation mode (online control system), and confidentiality mode (accessing password protected functions and system pages).

Operators can access pages in various ways: by using function keys, page lists, directly entering page numbers, or by calling PLC commands. The input and modification of variable fields are completed through the keyboard or touch screen, and support instant writing (Shift+arrow keys) function. Alarm management is one of the core operations, which can be accessed through independent alarm keys (or touch icons) to confirm, filter by group, and print the alarm list.

The terminal configuration (such as time, language, screen parameters, printer, and communication line settings) can be directly modified through the system menu and saved in the PCMCIA card. The TXBT terminal also provides powerful variable adjustment function, which can directly read and modify multiple variable types in the connected PLC, and supports importing symbol files from PL7 or Concept for easy debugging by maintenance personnel.

Suggestions for Communication Optimization and System Integration

To ensure efficient human-machine dialogue response, it is necessary to optimize the communication between the terminal and PLC:

According to the frequency of variable usage, allocate cautiously to single, loop, or permanent reads.

Set the addresses of loop read variables on the same page to continuous.

Avoid including unnecessary words in the dialogue table.

Adjust the reading cycle of the conversation table based on the application and network load.

The communication performance of static function key commands is usually better than that of dynamic function keys. It is recommended to assign control functions to static keys and navigation and data input functions to dynamic keys.

Conclusion: Building a comprehensive platform for reliable industrial interfaces

The Magelis XBT-F/TXBT-F series graphical terminal and its XBT-L1000 development software together form a comprehensive, flexible, and robust industrial human-machine interface solution. From hardware selection, application structured design, implementation of secure communication mechanisms, to detailed development processes and operational specifications, this system is committed to building a clear, efficient, and secure human-machine dialogue bridge in complex industrial automation environments. By gaining a deep understanding of its architecture and principles, engineers can fully unleash its potential to achieve transparent monitoring, precise control, and efficient maintenance of the production process, thereby enhancing the overall system's availability and productivity.