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  各大品牌PLC的功能區(qū)別如下：

                                         永宏FBS            西門子S7-200          三菱FX2N                歐姆龍CPM2A
控制程式容量                 20K   Words     8K   Words          8K   Words          4K   Words　
應(yīng)用指令                     超過300條            1條                   128條                185條
累計計時器                   極限掃描時間          不支持                不支持                 不支持
高速計數(shù)器     軟件          4組（8點(diǎn)）           不支持                 6個                   不支持
               硬件          4組（8點(diǎn)）           6個                   主機(jī)不支持             1個
NC控制功能    控制軸數(shù)      4軸                   2軸                  1軸                    2軸
               ******脈沖頻率   920KHZ                    20KHZ                      20KHZ                         10KHZ
                       動態(tài)下載參數(shù)   支持                 不支持                不支持                 不支持
通訊功能       通信口          5個                 2個                   2個                    1個
               ******速率       921。6Kbps             187.5Kbps                 38.4Kbps                     38.4Kbps