为解决原有电镀生产线存在工作效率低，温度控制需人工操作，质量不稳定等问题。采用西门子S7-300 PLC为功能核心，组态王(KingView 6.55)软件提供上位监控，PID(比例?积分?微分)表控制电热丝和电磁阀自动切换相结合的方式，实现了镀槽的恒温控制。详细介绍了控制系统结构、温度控制原理、控制方式等。该系统满足了电镀工艺恒温控制的要求，监控方便，可靠性好，提高了企业的自动化水平。
Aiming to solve the problems of low efficiency, manual operation of temperature control, and unstable quality existing in a plating production line, constant-temperature control was realized by combination of Siemens S7-300 PLC as foundational and core component, KingView 6.55 software for upper supervision, and PID (proportion-integration- differentiation) instrument for controlling electric heating wire and solenoid valve automatic switching. The framework of the control system, principle of temperature control, and controlling modes were described. The system meets the requirement of constant-temperature control during plating production, with advantages of convenient monitoring and good reliability, leading to an improvement of automation level of the enterprise.
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