一、标准触点 LD、A、O、LDN、AN、ON、 LD，取指令。表示一个与输入母线相连的常开接点指令，即常开接点逻辑运算起始。LDN，取反指令。表示个与输入母线相连的常闭接点指令，即常闭接点逻辑运算起始。A，与指令。用于单个常开接点的串联。AN，与非指令。用于单个常闭接点的串联。O，或指令。用于单个常开接点的并联。ON，或非指令。用于单个常闭接点的并联。二、正、负跳变 ED、EU ED，在检测到一个正跳变（从OFF到ON）之后，让能流接通一个扫描周期。EU，在检测到一个负跳变（从ON到OFF）之后，让能流接通一个扫描周期。 三、输出 = =，在执行输出指令时，映像寄存器中的参数位被接通。 四、置位与复位指令S、R S，执行置位(置1)指令时，从bit或OUT的地址参数开始的N个点都被置位。R，执行复位(置0)指令时，从bit或OUT的地址参数开始的N个点都被复位。置位与复位的点数可以是1-255，当用复位指令时，如果bit或OUT的是T或C时，那么定时器或计数器被复位，同时当前值将被清零。五、空操作指NOP NOP指令不影响程序的执行，执行数N（1-255）。
1、 Standard contacts LD, a, O, LDN, an, on, LD, take the command. Indicates a normally open contact command connected to the input bus, that is, the start of normally open contact logic operation. LDN, reverse the instruction. Indicates a normally closed contact command connected to the input bus, that is, the start of the logic operation of the normally closed contact. A. And instructions. Used for series connection of single normally open contact. An, and non directive. Used for series connection of single normally closed contact. O. Or instructions. Used for parallel connection of single normally open contact. On, or non command. Used for parallel connection of single normally closed contact. 2、 Positive and negative jump ed, EU ed, after detecting a positive jump (from off to on), let the energy flow turn on for a scanning cycle. EU, after detecting a negative jump (from on to off), let the energy flow turn on for a scanning cycle. III. output = =, when executing the output instruction, the parameter bit in the image register is turned on. IV. set and reset instructions s, r s, when executing the set (Set 1) instruction, n points starting from the address parameter of bit or out are set. R. When the reset (set to 0) instruction is executed, n points starting from the address parameter of bit or out are reset. The number of points for setting and resetting can be 1-255. When using the reset instruction, if the bit or out is t or C, the timer or counter will be reset and the current value will be cleared. 5、 Empty operation refers to NOP. The NOP instruction does not affect the execution of the program, and the number of executions is n (1-255).
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