在开放式数控系统中，PLC模块的开发在高性能CNC系统中有着重要的作用。
The PLC is an important module to high-performance open CNC system.
经过实例验证，使用本文设计的宏指令系统编制而成的宏程序，完全可以在开放式数控系统上正确运行。
After example validating, the macro program wrote with macro instruction system designed in this dissertation can run well in open NC system.
对软plc的性能测试表明，软plc的执行速度较硬plc有了大幅度提高，为软plc在开放式数控系统中的应用提供了借鉴。
The performance test demonstrates that the speed of soft PLC is much higher than that of common PLC. The further soft PLC application in open nc system can use this work for references.
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