150-F201NBD150-F201NBD150-F201NBD150-F201NBD产品也有它自己的语言。但不管什么型号的，其编程语言都具有以下特点：1.图形式指令结构：程序由图形方式表达，指令由不同的图形符号组成，易于理解和记忆。系统的软件开发者已把工业控制中所需的***运算功能编制成象征***形，用户根据自己的需要把这些图形进行组合，并填入适当的参数。在逻辑运算部分，几乎所有的厂家都采用类似于继电器控制电路的梯形图，很容易接受。如西门子公司还采用控制系统流程图来表示，它沿用二进制逻辑组件图形符号来表达控制关系，很直观易懂。较复杂的算术运算、定时计数等，一般也参照梯形图或逻辑组件图给予表示，虽然象征性不如逻辑运算部分，也受用户欢迎2.明确的变数常数：图形符相当于操作码，规定了运算功能，操作数由用户填人，如：K400，T120等。PLC中的变量和常数以及其取值范围有明确规定，由产品型号决定，可查阅产品目录手册。产品也有它自己的语言。但不管什么型号的PLC，其编程语言都具有以下特点：150-F108NBD150-F108NBDB150-F108NBDD150-F108NBR150-F108NZD150-F1250NBA150-F1250NBE150-F1250NBEB150-F1250NZA150-F135FBD150-F135NBD150-F135NBDB150-F135NBDD150-F135NBR150-F135NBRD150-F135NZD150-F135NZDB150-F201FBD150-F201NBD150-F201NBDB150-F201NBDD150-F201NBR150-F201NBRB150-F201NBRD150-F201NCD150-F201NCDB150-F201NZD150-F251FAD150-F251FBD150-F251NBD150-F251NBDB150-F251NBDD150-F251NBR150-F251NCD150-F251NCDB150-F251NZD150-F25NBD150-F25NBDB150-F25NBR150-F317FBD150-F317FBD-20E-NB-UL150-F317NBD150-F317NBDB150-F317NBDD150-F317NBR150-F317NCD150-F317NCDB150-F317NZD150-F361FBD150-F361NBD150-F361NBDB150-F361NBDD150-F361NBR150-F361NCDB150-F361NCR150-F361NZD150-F43NBD150-F43NBDB150-F43NBDD150-F43NBR150-F43NBRB150-F480NBD150-F480NBDB150-F480NBDD150-F480NBR150-F480NZD150-F480NZDB150-F5NBD150-F5NBDB150-F5NBR150-F5NCD150-F60NBD150-F60NBDB150-F60NBDD150-F60NBR150-F60NBRB150-F625JBE150-F625NBA150-F625NBAB150-F625NBAD150-F625NBE150-F625NBEB150-F625NBED150-F625NCAD150-F625NZA150-F625NZAB150-F780NBA150-F780NBAB150-F780NBAD150-F780NBE150-F780NBEB150-F780NCA150-F84150-F84L150-F85FBDB-8L150-F85NBD150-F85NBDB150-F85NBDD150-F85NBR150-F85NBRB150-F85NBRD150-F85NCD150-F86L150-F970NBA150-F970NBAB150-F970NBE150-F970NZA150-F970NZE150-FPP108B150-FPP135B150-FPP201B150-FPP251B150-FPP25B150-FPP317B150-FPP361B150-FPP43B150-FPP480B150-FPP60B150-FPP625B150-FPP780B)