即使開發(fā)成功,也經(jīng)常發(fā)生故障。對于PLC來說,70年代中期曾經(jīng)開發(fā)過專用操作站,但不太成功。后來它就沒有開發(fā)專用操作站,當時,PLC只處理開關量,在控制器上的數(shù)碼顯示作為人機界面也能滿足要求。PLC的控制器和I/O之間用網(wǎng)絡連接。到80年代末和90年代,模擬量控制進入PLC,。用戶感到?jīng)]有以CRT為基礎的人機界面很不方便,用戶選用通用監(jiān)控軟件,運行在NT平臺上,采用普通微機作為硬件平臺,編出各個PLC的驅動軟件,這樣PLC也有了操作站。對于通用監(jiān)控軟件來說,如INTOUCH軟件,支持微軟開發(fā)的通訊協(xié)議DDE(DYNAMIC DATA EXCHANGE)、快速DDE、網(wǎng)絡DDE等。u DDE允許Windows環(huán)境下各使用的機器建立客戶機/服務器關系
3HAB3702-17 Sealing ring not dust lip
3HAB3702-18 Sealing ring not dust lip
3HAB3702-21 Sealing ring not dust lip
3HAB3702-23 Sealing ring not dust lip
3HAB3702-24 Sealing ring not dust lip
3HAB3702-25 Sealing ring not dust lip
3HAB3702-28 Sealing ring not dust lip
3HAB3702-29 Radial Sealing
SIEMENS/MOORE 16182-1-2 MBX TRANSITION 1618212
SIEMENS MOORE PRODUCTS 39EAMCAN EAM ENHANCED ANALOG MODULE APACS+QUAD 16154-101
SIEMENS MOORE PRODUCTS 15484-11-4 PC APACS
MOORE SIEMENS 15937-18 MULTI-POINT CARD 772 ENCLOSURE CHASSIS 20-SLOT TRANSDUCER
SIEMENS/MOORE 16167-1-3 SDM TERMINATION ASSEMBLY 1616713
SIEMENS/MOORE 16169-1-7 SAM TERMINATION ASSEMBLY 1616917
SIEMENS MOORE PRODUCTS 15736-66-2 PC
Siemens Moore XTC Transmitter-Co?ntroller 340DBBSAAB NN213
Moore Siemens 16407-1-01 chassis rack 16407101 APACS + 10 slot modulrac card
SIEMENS/MOORE 16167-1-2 SDM TERMINATION ASSEMBLY 1616712
MOORE SIEMENS 15532-2FM ADJUSTABLE GAIN MOD SERIES 380G
MOORE SIEMENS 15532-3FM-S MULTIPLIER DIVIDER SERIES 380
SIEMENS/MOORE 16147-51-02 ACM TRANSITION 161475102