¥ 1260.00
¥ 1180.00
¥ 1180.00
¥ 1180.00
¥ 1180.00
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1. 外部输入信号的采集
PLC的外部设备主要是指控制系统中的输入输出设备,其中输人设备是对系统发出各种控制信号的主令电器,在编写控制程序时必须注意外部输入设备使用的是常开还是常闭触点,并以此为基础进行程序编制。否则易出现控制错误。
在PLC内部存储器中有***于输入状态存储的输入继电器区,各输入设备(开关、按钮、行程开关或传感器信号)的状态经由输入接口电路存储在该区域内,每个输入继电器可存储一个输入设备状态。PLC中使用的"继电器"并非实体继电器,而是"软继电器",可提供无数个常开、常闭触点用于编程。
DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM w/DIGITAL
DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM w/DIGITAL
DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL 2
DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM w/DIGITAL
DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM w/DIGITAL
DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL 1
DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM w/DIGITAL
DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL b4
DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL b5
DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL b6
DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL b7
X-RAY TUBE M-113T VARIAN MEDICAL SYSTEMS
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Auto X-Ray EZ LINK Automotive Diagnostic System
Planar Systems Inc. iHBS212-08-Lite On 12X Blu-Ray Writ
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The Solar System: Saturn's Satellites - X-ray and Gamma
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ADD 10X BLU-RAY BURNER & READER TO MY SYSTEM