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Xiamen Yingyi Automation Technology Co., Ltd
The IC695HSC304 high-speed counter module provides critical feedback for the control system
Date: 2025-08-20Read: 20
In the field of modern industrial automation, ordinary PLC input modules are no longer capable of handling high-frequency pulse signals from servo motor encoders, high-speed rotating machinery, filling production lines, or motion control systems. The IC695HSC304 high-speed counter module has become a "pulse catcher" that accurately captures microsecond level pulses, widely used in positioning control, speed measurement, flow measurement, and high-speed piece counting scenarios. The IC695HSC304 high-speed counter module achieves real-time and accurate processing of pulse frequency, period, direction, and cumulative quantity through dedicated hardware circuits and high-speed processors, providing critical feedback for the control system.
1. High speed optocoupler input circuit
As the "nerve endings" of the module, the high-speed optocoupler isolation input circuit is responsible for receiving pulse signals (such as A/B-phase orthogonal pulses and Z-phase signals) from sensors such as encoders and proximity switches. It has high response speed (up to 500kHz-2MHz or above), strong resistance to electromagnetic interference, and electrical isolation function, effectively filtering out on-site noise and ensuring the integrity and safety of signal transmission.
2. Specialized Counting Processor
The module is equipped with an independent FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit) as the core decision-making unit of the "catcher". It does not rely on the main CPU scanning cycle and can process multiple pulse inputs in parallel and real-time, achieving high-speed accumulation, subtraction, frequency measurement, cycle calculation, and position comparison. Its response speed far exceeds software counting.
3. Orthogonal decoder
For the A/B phase signals of incremental encoders, the module integrates hardware orthogonal decoding circuits. By determining the phase difference between signals A and B, accurately identifying the direction of motion (forward/reverse), and supporting 1x, 2x, or 4x modes, the resolution is increased to 4x of the original pulse, achieving sub micron level precise positioning.
4. Compare output units
The module can preset multiple comparison values (such as target position, count value). When the accumulated pulse reaches the set value, the hardware immediately triggers the DO (digital output) signal, and the response time can reach microseconds. This function is used for precise positioning of shutdown, automatic sorting, or synchronous control, without waiting for PLC program scanning, greatly improving system response speed.
5. Communication interface
Communicate with the main control PLC or upper computer through standard industrial buses (such as PROFIBUS, CANopen, EtherCAT, Modbus TCP) or backplane buses, upload real-time data such as current count values, frequencies, status flags, etc., and receive new set parameters to achieve centralized monitoring and dynamic adjustment.
6. Power supply and status indication
The module is equipped with an independent power management circuit to ensure stable power supply. The LED indicator light displays real-time power, operation, errors, and the status of each input channel, facilitating quick diagnosis and maintenance.