In the safety control system of CNC equipment, the lock code panel is the core operating interface, and the collaborative work of its display module and information exchange function directly determines the accuracy and safety of equipment operation. The two do not operate independently, but form a closed-loop control through logical linkage, jointly realizing the complete operation process of "information presentation instruction input feedback confirmation".
As the "information window" of the CNC lock code panel, the core function of the display module is to visualize the device status, encryption status, and operation instructions. It usually uses an LCD or OLED display screen, which receives digital signals transmitted by the main control unit through a driver chip and converts them into text, icons or codes that can be recognized by the operator - such as real-time display of "encryption activated", "key verification in progress" and other statuses, or pop up a prompt of "password error, please retry" when there is an operation error. Unlike ordinary display units, the display module of the lock code panel needs to have high stability, be able to maintain clear display under temperature fluctuations and electromagnetic interference in industrial environments, and be linked with encryption logic to unlock display permissions for key information (such as device parameters, encryption levels, etc.) only after authorized operations.
The information exchange function plays the role of an "instruction bridge", responsible for receiving input instructions from operators and transmitting them to the main control unit for processing. Its hardware carrier includes physical buttons (such as numeric keys, confirm keys, reset keys) or touch modules, while at the software level, it needs to have encryption verification logic - for example, when the operator inputs a password, the information exchange module will first perform preliminary format verification on the input data (such as whether the number of digits meets the requirements), and then encrypt and transmit it to the main control unit to avoid plaintext instructions being intercepted. At the same time, the module also needs to receive feedback signals from the main control unit, trigger the display module to update its status, and form an interactive closed loop of "input processing feedback".
The collaborative work of the two is mainly achieved through three key links: firstly, "instruction triggered display". When the operator presses the "unlock" button, the information interaction module immediately sends instructions to the main control unit, and the main control unit synchronously drives the display module to pop up the "please enter key" guidance interface; Secondly, there is "real-time status synchronization". During the key input process, the display module will dynamically display the "*" symbol (hiding the actual password) based on the input progress transmitted by the information exchange module, and synchronously display the transition status of "verification in progress" after the input is completed; Finally, there is the 'result feedback linkage'. If the key verification is successful, the main control unit will send a signal to both modules simultaneously - the information exchange module will lock the input (to prevent repeated operations), and the display module will switch to the 'unlocked successfully, device ready' state; If the verification fails, the display module will pop up an error message, and the information exchange module will reset the input interface and wait for the next operation.
This collaborative mechanism not only ensures the intuitiveness of the operation process, but also strengthens encryption security through logical linkage, avoiding operational errors or security vulnerabilities caused by asynchronous display and interaction. It is the core technical foundation for reliable control of CNC lock code panels.