CAN bus technology significantly enhances the functionality and performance of the HPHT Hydraulic Cubic Press control system by establishing an efficient and reliable communication network, demonstrating superiority, especially in meeting the higher demands for stability, precision, and real-time monitoring required by high-quality diamond synthesis processes.

Here is a detailed explanation of how CAN bus technology enhances the functions and performance of the HPHT Hydraulic Cubic Press control system:

I. Enhanced Functionality (Functionality Enhancement)

CAN bus technology primarily achieves real-time coordinated control and centralized monitoring management by constructing two layers of networks: internal and external.

1. Achieving Real-Time Data Exchange and Coordinated Control among Internal Control Units:

    Within a single hydraulic press, the CAN fieldbus connects control units equipped with CAN interfaces (such as the heating program setter, pressure controller, over/under current protector, recorder, etc.) to form an internal bus communication network.

    This network structure allows each control unit to both transmit data to and receive data from other control units.

    This completes the function of real-time data exchange and coordinated control during the working process.

    For example, the heating program setter controls the 15-segment heating curve, the pressure controller controls the pressure curve, and the recorder records and stores the parameters of every working cycle in real time.

2. Achieving Workshop-Level Centralized Monitoring and Management:

    The recorder in the press control system serves as a node for that specific press control system.

    The control systems of various presses in the workshop, via these nodes and an industrial control computer (IPC), form an external communication network for data communication and control.

    This achieves the goal of centralized monitoring and management.

    A single upper computer in the central control room can perform data acquisition and monitoring for up to 50 presses on-site.

3. Providing Remote Monitoring and Parameter Modification Capability:

    The external bus network transmits real-time pressure, current, set values for the process curve, and alarm information stored in the recorder module of the press control system to the upper computer for monitoring and storage.

    The upper computer can modify and control the parameters of any single press control system via the bus.

II. Enhanced Performance and Superiority (Performance Enhancement and Superiority)

CAN bus is recognized as one of the most promising fieldbuses, and its unique design and technical features bring significant performance improvements to the control system.

1. High Reliability and Stability:

    CAN bus possesses excellent anti-interference characteristics and extremely high reliability.

    Actual operation has demonstrated that the system performance is stable and reliable. Practice over more than four years has proven the system has strong anti-interference capability.

2. Accurate and Error-Free Data Transmission:

    CAN bus includes CRC check measures (Cyclic Redundancy Check) and features error identification and automatic retransmission functions.

    In actual application, connecting 50 presses at a baud rate set to 500 kbps, there was no data loss and no transmission errors between the upper computer and the lower machines.

3. Technical Advantages Leading to Flexibility and Real-Time Performance:

    CAN bus technology offers advantages in flexibility, real-time capability, accuracy, and reliability.

    It adopts a multi-master working mode, enabling transmission methods like point-to-point, one-to-many, and global broadcast.

    It employs a non-destructive, priority-based competition bus arbitration method.

    Signal transmission uses a short frame structure (8 bytes per frame), with a maximum transmission rate of up to 1 Mbps.

4. Positive Impact on Production Processes:

    The system provides a strong guarantee for the control of the synthesis process of the HPHT Hydraulic Cubic Press and the improvement of workshop management level.

    It also plays an obvious role in improving product quality grade and controlling costs.

In essence, the CAN bus acts like the "nervous system" for the cluster of HPHT Hydraulic Cubic Presses. Inside a single press, it ensures real-time, error-free collaboration among subunits controlling critical parameters like temperature and pressure (internal network).

 At the entire workshop level, it allows the central control room to carry out unified command, remote adjustment, and status monitoring of all presses (external network), thereby transforming previously dispersed control into an integrated and highly efficient management system.