描述
FX系列PLC通讯方式控制变频器的方法：它只需在PLC主机上安装一块RS-485通讯板或挂接一块RS-485通讯模块；在PLC的面板下嵌入一块造价仅仅数百元的“功能扩展存储盒”，编写4条极其简单的PLC梯形图指令，即可实现8台变频器参数的读取、写入、各种运行的监视和控制，通讯距离可达50m或500m
AGILENT HP 6674A SYSTEM DC POWER SUPPLY 60VOLT 35AMP
WANDEL & GOLTERMANN PCM CHANNEL MEASUREMENT SET PCM-4
HP 6652A SYSTEM DC POWER SUPPLY 20V/25A
HP 6626A SYSTEM DC POWER SUPPLY 4 OUTPUT
AGILENT HP 85046B S-PARAMETER TEST SET WITH OPT C03
LECROY 9354AM 4 CHANNEL 500MHz DIGITAL OSCILLOSCOPE
HP 8349B 2GHz-20GHz MICROWAVE AMPLIFIER NICE CONDITION
JDS FITEL SB SERIES FIBER OPTIC SWITCH100-240V 50/60MHz
Hewlett-Packard / Agilent E5272A FRAME WITH E5281A UNIT
ANRITSU NETWORK ANALYZER MS3606B 10KHz-1GHz
