描述
80年代以后,PLC除逻辑运算外,控制回路用的算法功能已经大大加强,但plc用梯形图编程,模拟量的运算在编程时不太直观,编程比较麻烦。但在解算逻辑方面,表现出快速的优点,在微秒量级,解算1k逻辑程序不到1毫秒。它把所有的输入都当成开关量来处理,16位(也有32位的)为一个模拟量。
ELECTROSTATIC FIELDMETER ION SYSTEMS 775PSV – TESTED
ELECTROSTATIC FIELDMETER ION SYSTEMS 775PSV – NEW
EXHAUST FILTER ALCATEL ST 25 S – REFURBISHED
EXHAUST FILTER LEYBOLD AF4-8 – PN 189 06 – REFURBISHED
HV GATE VALVE VAT F-12-60043-569 – TESTED
HV GATE VALVE VAT F12-70565-02 – TESTED
MASS FLOW CONTROLLER TYLAN FC280 Gas:H2 Range:300Sccm
PRECISION TEMPERATURE CONTROLLER EUROTHERM 2108i
PRECISION TEMPERATURE CONTROLLER EUROTHERM 2108i – NEW
PRECISION TEMPERATURE CONTROLLER EUROTHERM 902S – NEW