描述
硬件组态和存储器概念
装载存储器是一个可编程模块,它包括建立在编程设备上的装载对象(逻辑块、数据块和其他信息),它可以是存储器卡或内部集成的ram。存储器卡一般有两种,其中,当采用ram存储器卡时,系统必须配备电池,当采用flasheprom存储器卡时,则断电不会丢失,但内部ram中的数据仍需电池保持。
工作存储器仅包含和运行时间使用的程序和数据,ram工作存储器集成在cpu中,通过后备电池保持。系统存储器包括过程映象输入和输出表(pii,piq),位存储器,定时器,计数器和局部堆践。保持存储器是非挥发的ram,即使没有安装后备电池也可用来保持某些数据,设置cpu参数时要指定保持的区域。
从上述概念可知,假如我们在线修改程序,被修改的块存放在工作存储器中,当把程序上载到编程器时,就从工作存储器传到编程器。由于断电会导致ram数据的丢失,所以假如要安全保存被修改的程序,就必须保存在feprom或硬盘上。
硬件组态和参数分配
组态就是指在硬件组态的站窗口中分配机架、块可分布式i/o,可从硬件目录中选择部件;参数分配就是建立可分配参数模块的特性,例如启动特性、保持区等;设定组态就是设定好的硬件组态和参数分配;实际组态指已存在的实际组态和参数分配,一般是在已装配的系统中,从plc的cpu中读出来的。
欧美品牌停产的,常用的“PLC”备品备件
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ONEAC FT1115 MRC ECLIPSE STAR 120V 12A AC-POWER SUPPLY
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LEYBOLD STRAIGHT THRU VALVE,29923
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Applied Materials 0040-97144 STRAP CONNECTOR F.G.
YASKAWA AC BRUSHLESS MOTOR SERVO,SGMP-01U314CM
EMOTEQ BRUSHLESS DC SERVO MOTOR HS01001-A02-HGE
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ION SYSTEMS FLOW BAR CONTROLLER,100VAC,1/4 A
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KOBOLD INSTRUMENTS FLOWMETER,SV-10
CTE CHEM TEC/SEMITOOL ANALOG FLOWMETER,
Flowline Level Transmitter KC-LA15-5001
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APPLIED MATERIALS INC.LINER,SIDE,P19500 AMI
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RTS SPARES LLC ASSEMBLY.SHUTTER,A65
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DAIFUKU CO.,LTD UNIT(S/R)YAGI OPTI,TRANSMIT
Entegris 2 WAY VALVE 3/8 X 1/4 ORIFICE 201-87-01
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Pacific Scientific Motor STF3624-5604-61?-56C
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