P0914TB 模块 而西门子PLC采用存储逻辑，其控制逻辑是以程序方式存储在内存中，要改变控制逻辑，只需改变程序即可，方便快捷。 四、西门子PLC控制的优点 目前国内水泥散装机的电控部分大都是以大量的时间继电器和中间继电器组成的实序逻辑控制电路来控制各个阀门、电机的启停时间和顺序，在整个工作流程中各元器件动作很频繁，尤其是时间继电器在现场环境比较恶劣的条件下更是容易损坏，故障率高。经常造成装车工作中断，降低了工作效率。而采用西门子PLC控制系统则大大避免了上述问题。西门子PLC控制系统与继电器控制系统相比有如下优点： （1）控制方式 继电器的控制是采用硬件接线实现的，利用继电器机械触点的串联或并联及延时继电器的滞后动作等组合形成控制逻辑，只能完成既定的逻辑控制。 而西门子PLC采用存储逻辑，其控制逻辑是以程序方式存储在内存中，要改变控制逻辑，只需改变程序即可，方便快捷。
P0926KM Power Supply Output Cable - 121 cm (48 in)P0922YU Power Supply, FPS 400-24P0926CM Power CableP0904HA Industrial Power Module, 2 LAMBDAP0926HW 2 FCP Slots Vert. Baseplate, Time StrobeP0916MZ 2 Mbps Base To Base Cable, 1mP0926KM Power Supply Output Cable - 121 cm (48 in)P0926JM 8 Slots Vert. Baseplate, Time Strobe, 8 FBMP0916MZ 2 Mbps Base To Base Cable, 1mP0926KM Power Supply Output Cable - 121 cm (48 in)P0914SQ FBM201 Channel Isolated 8 Input 0-20 mAP0916AA Compression Term Assembly, FBM201P0916DB FBM2xx Type 1 Term Cable, 1 MeterP0926EQ FBM202 Channel Isolated 8 Input Thermocouple/mVP0916AC Compression Term Assembly, FBM202P0916DV FBM2xx Type 2 Term Cable, 1 MeterP0914SV FBM203 Channel Isolated 8 Input RTDP0916AE Compression Term Assembly, FBM203P0916DB FBM2xx Type 1 Term Cable, 1 MeterP0916DD FBM2xx Type 1 Term Cable, 5 MetersP0914XS FBM237 Channel Isolated 8 Output 0-20 mAP0916CC Compression Term Assembly, FBM237P0916DB FBM2xx Type 1 Term Cable, 1 MeterP0914XS FBM237 Channel Isolated 8 Output 0-20 mAP0916CC Compression Term Assembly, FBM237P0916DB FBM2xx Type 1 Term Cable, 1 MeterP0916QD Redundancy Adapter For FBM218/FBM237P0914WH FBM207b Ch Isolated 16 DIN 24 Vdc Contact SenseP0916JS Compression Term Assembly, FBM207b, Contact SenseP0916FH FBM2xx Type 4 Term Cable, 1 MeterP0914WH FBM207b Ch Isolated 16 DIN 24 Vdc Contact SenseP0916JS Compression Term Assembly, FBM207b, Contact SenseP0916FH FBM2xx Type 4 Term Cable, 1 MeterP0916DD FBM2xx Type 1 Term Cable, 5 MetersP0916TA FBM242 Channel Isolated External Source DOP0916NG Compression Term Assembly, FBM242, 5A Relay OutP0916JY Compression Term Assembly, FBM242, 2A 60V fuse OutP0916FH FBM2xx Type 4 Term Cable, 1 MeterP0916FK FBM2xx Type 4 Term Cable, 5 MetersP0916TA FBM242 Channel Isolated External Source DOP0916NG Compression Term Assembly, FBM242, 5A Relay OutP0916JY Compression Term Assembly, FBM242, 2A 60V fuse OutP0916FH FBM2xx Type 4 Term Cable, 1 MeterP0916FK FBM2xx Type 4 Term Cable, 5 MetersP0916CQ FBM206 Channel Isolated 8 Input PulseP0916JQ Compression Term Assy, FBM206P0916DB FBM2xx Type 1 Term Cable, 1 MeterP0914TN FBM211 Differential 16 Input 0-20 mAP0916BT Compression Term Assembly, FBM211, FBM PoweredP0916FH FBM2xx Type 4 Term Cable, 1 MeterP0916FK FBM2xx Type 4 Term Cable, 5 MetersP0914TR FBM217, Discrete Inputs, 32 ChannelsP0916CA Compression Term Assy, FBM217, 15-30 Vdc VmonP0916FH FBM2xx Type 4 Term Cable, 1 MeterP0916FK FBM2xx Type 4 Term Cable, 5 MetersP0914TR FBM217, Discrete Inputs, 32 ChannelsP0916CA Compression Term Assy, FBM217, 15-30 Vdc VmonP0916FH FBM2xx Type 4 Term Cable, 1 MeterP0916FK FBM2xx Type 4 Term Cable, 5 MetersP0922VT FBM214, HART Inputs, 8 ChannelsP0916BX FBM214/216 Compression Termination AssemblyP0916DB FBM2xx Type 1 Term Cable, 1 MeterP0916DD FBM2xx Type 1 Term Cable, 5 MetersP0922VU FBM215, HART Output, 8 ChannelsP0916DB FBM2xx Type 1 Term Cable, 1 MeterP0922VV FBM216, Redundant Ready HART Inputs, 8 ChannelsP0916BX FBM214/216 Compression Termination AssemblyP0916DB FBM2xx Type 1 Term Cable, 1 MeterP0916DD FBM2xx Type 1 Term Cable, 5 MetersP0922VW FBM218, Redundant Ready HART Output, 8 ChannelsP0916QD Redundancy Adapter For FBM218/FBM237P0916DB FBM2xx Type 1 Term Cable, 1 Meter
