描述
并联块串联时,应将接点多的去路放在梯形图左方(左重右轻原则);串联块并联时,应将接点多的并联去路放在梯形图的上方(上重下轻的原则)。这样做,程序简洁,从而减少指令的扫描时间,这对于一些大型的程序尤为重要
OptiSpec ME3200 Fiber Optic Video Microscope
Hewlett Packard 37717C , Omniber717 WITH OPTS
Hewlett Packard 37717C with 110,A3B Omniber717
HP/Agilent E1406A VXI COMMAND MODULE
Agilent J4223A SpectralBER DWDM Controller with Option
TEKTRONIX VX4610 TEKTRONIX SDH/SONET GENERATOR RECEIVER
WaveSplitter 2×2 C-band Fused Fiber Coupler