The upper level microcomputer is monitor andproduction manager of lower level microcomputer, it is re lated ooperator directly, Twoleyl miorocomputer are connec ted by data commun teation.
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美
- 上位机作为下位机的监控和生产管理级。它与操作员是直接联系;两级之间通过数据通讯相互联系。