CEM 该章节包括以下主题的信息:常规 (S7-1200, S7-1500, S7-1200 G2)原因指令 (S7-1200, S7-1500, S7-1200 G2)结果指令 (S7-1200, S7-1500, S7-1200 G2)交叉点动作 (S7-1200, S7-1500, S7-1200 G2)