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回复：step7的编程问题

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钻石如何晋级?

发布于 2014-01-09 08:45:53

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不过我从在线帮助上看，描述如下：
JC Jump if RLO = 1
If the result of logic operation is 1, JC interrupts the linear program scan and jumps to a jump destination. ……
If the result of logic operation is 0, the jump is not executed. The RLO is set to 1, and the program scan continues with the next statement.

JCB Jump if RLO = 1 with BR
If the result of logic operation is 1, JCB interrupts the linear program scan and jumps to a jump destination. ……
If the result of logic operation is 0, the jump is not executed. The RLO is set to 1, and the program scan continues with the next statement.
Independent of the RLO, the RLO is copied into the BR for the JCB instruction.

从以上的描述来看，Automann说的是正确的。

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