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PROGRAMMABLE CONTROLLER HAVING FUNCTIONAL EXPANSION CASSETTE AND METHOD FOR DISCRIMINATING TYPE OF THE FUNCTIONAL EXPANSION CASSETTE
PROGRAMMABLE CONTROLLER HAVING FUNCTIONAL EXPANSION CASSETTE AND METHOD FOR DISCRIMINATING TYPE OF THE FUNCTIONAL EXPANSION CASSETTE
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机译：具有功能扩展盒的可编程控制器和判别功能扩展盒的类型的方法
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摘要
PROBLEM TO BE SOLVED: To enable miniaturization by preventing increase of the number of ports and connectors.;SOLUTION: In a microprocessor 2 of a control unit 1, when a power is applied, a level of a port P2 for discriminating a type is first confirmed after setting a port P1 for control and the port P2 for discriminating the type in an input port respectively. Then, when the level of the port P2 for discriminating the type is L level, a functional expansion cassette connected with a connector 3 for connection is discriminated as a type A in figure 2 by the microprocessor 2 as a type discriminating means. Meanwhile, the level of the port P2 for discriminating the type is H level, the microprocessor 2 confirms a level of the port P1 for control, when the level is the H level, discriminates the functional expansion cassette connected with the connector 3 as a type B in figure 2 and when its level is the L level, discriminates the functional expansion cassette as a type C in figure 2.;COPYRIGHT: (C)2003,JPO
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