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  各大品牌PLC的功能區別如下：

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