描述
从工作方式上看,在继电器控制电路中,当电源接通时,电路中所有继电器都处于受制约状态,即该吸合的继电器都同时吸合,不该吸合的继电器受某种条件限制而不能吸合,这种工作方式称为并行工作方式。而PLC的用户程序是按一定顺序循环执行,所以各软继电器都处于周期性循环扫描接通中,受同一条件制约的各个继电器的动作次序决定于程序扫描顺序,这种工作方式称为串行工作方式。
NEW Sundstrand-Sauer-Danfoss Hydraulic Series 47 Pump
81 Sundstrand-Sauer-Danfoss Hydraulic Series 47 Pump
86 Sundstrand-Sauer-Danfoss Hydraulic Series 47 Pump
85 Sundstrand-Sauer-Danfoss Hydraulic Series 47 Pump
83 Sundstrand-Sauer-Danfoss Hydraulic Series 47 Pump
78 Sundstrand-Sauer-Danfoss Hydraulic Series 47 Pump
82 Sundstrand-Sauer-Danfoss Hydraulic Series 47 Pump
77 Sundstrand-Sauer-Danfoss Hydraulic Series 47 Pump
84 Sundstrand-Sauer-Danfoss Hydraulic Series 47 Pump
80 Sundstrand-Sauer-Danfoss Hydraulic Series 47 Pump
79 Sundstrand-Sauer-Danfoss Hydraulic Series 47 Pump
87 Sundstrand-Sauer-Danfoss Hydraulic Series 47 Pump
NEW Sundstrand-Sauer-Danfoss Hydraulic Series 47 Pump
NEW Sundstrand-Sauer-Danfoss Hydraulic Series 47 Pump