FNC120A-A10-Z607

FNC120A-A10-Z607

FNC120A-A10-Z607

FNC120A-A10-Z607

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Welch Allyn PROPAQ Encore 202 EL Patient Monitor, w/ Wireless Acuity, w/ Stand 

NEW RVSI MX-600 KIT Camera ACUITY CIMATRIX IDENTICS

Protocol PROPAQ Encore 202 EL Patient Monitor, w/ Wireless Acuity, w/ Stand

Protocol PROPAQ Encore 202 EL Multiparameter Patient Monitor, Acuity, Stand

Manual Halogen Projector System Acuity Cross Slide Mirror Set Screen

ACUITY IMAGING 070-200000 REV:B FRAME GRABBER BOARD

AS-DS41-601 ACUITY DETECTION SENSOR

ACUITY IMAGING CM4000 ANALOG CAMERA AND 1:2.8 50MM LENS

Acuity Visual Sensor AS-DS11-301 New

Electrohome 38-C34ANA-01 Acuity Monitor 110-240V ! WOW !

Visual Acuity Software w/remote Optometry Ophthalmology Optician

NextAcuity Software with Remote and Red/Green Glasses

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Acuity SR20 symbology reader

Bausch and Lomb Vision Acuity Projector

Visual Acquiring Testing Projector w/ slide and 3 bulbs

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Acuity Golf Club Set for ages 10-15

DIGITAL ACUITY SOFTWARE with Patient Education Module

Eye Chart software, visual acuity software. NEW

DIGITAL ACUITY SOFTWARE with Patient Education Pic/Vids

Visual Acuity Eye Chart software. NEW

RVSI ACUITY CM400 CCTV CAMERA

Juno Systems RV123/RV123P Binocular Vision/Acuity Screener w Stand

Acuity CiMatrix CM4000 B/W CCD Camera, super miniture

ADEPT TECH 30332-22350 USPP 3033222350

ADEPT TECH 90400-11140/XY-HRS-140AH404 USPP 9040011140XYHRS1

ADEPT TECH 10332-00716 USPP 1033200716

ADEPT TECH 10332-00714 USPP 1033200714

ADEPT TECH 30330-25000 USPP 3033025000

ADEPT TECH 90400-11180/XY-HRS-180AH404AD

ADEPT TECH 90400-11200/XY-HRS-200AH404AD

ADEPT TECH 10330-00710 USPP 1033000710

ADEPT TECH 30336-31000 USPP 3033631000

ADEPT TECH 10332-00655 USPP 1033200655

ADEPT TECH PA-4 USPP PA4

ADEPT TECH 30330-15000 USPP 3033015000

ADEPT TECH 10171-00020 USPP 1017100020

ADEPT TECH 10332-44710 USPP 1033244710

ADEPT TECH 10330-00600 USPP 1033000600

NIB ADEPT TECH 30340-40100 CONTROLLER CHASSIS MV-10 

ADEPT TECH 10350-01064 USPP 1035001064

ADEPT TECH 10350-01044 NSFP 1035001044

ADEPT TECH 90400-30013 USPP 9040030013

ADEPT TECH 90402-40013 USPP 9040240013

ADEPT TECH 90402-40013/XY-HRS013-S1B1-AD USPP 9040240013XYHRS0

ADEPT TECH 10330-15350 USPP 1033015350

ADEPT TECH 30330-12000 USPP 3033012000

ADEPT TECH 30340-40000 USPP 3034040000

ADEPT TECH 30340-20000 USPP 3034020000

ADEPT TECH 10330-11351 USPP 1033011351

ADEPT TECH 10330-12350 USPP 1033012350

ADEPT TECH 320 USPP 320

ADEPT TECH 90400-20045/XY-HRS-045M201 USPP 9040020045XYHRS0

ADEPT TECH 10337-15200 NSFP 1033715200

ADEPT TECH 10332-00500 NSPP 1033200500

2　PLC的构成 

　　从结构上分，PLC分为固定式和组合式（模块式）两种。固定式PLC包括CPU板、I/O板、显示面板、内存块、电源等，这些元素组合成一个不可拆卸的整体。模块式PLC包括CPU模块、I/O模块、内存、电源模块、底板或机架，这些模块可以按照规则组合配置。 

3　CPU的构成 

　　CPU是PLC的核心，起神经中枢的作用，每套PLC至少有一个CPU，它按PLC的系统程序赋予的功能接收并存贮用户程序和数据，用扫描的方式采集由现场输入装置送来的状态或数据，并存入规定的寄存器中，同时，诊断电源和PLC内部电路的工作状态和编程过程中的语法错误等。进入运行后，从用户程序存贮器中逐条读取指令，经分析后再按指令规定的任务产生相应的控制信号，去指挥有关的控制电路。 

　　CPU主要由运算器、控制器、寄存器及实现它们之间联系的数据、控制及状态总线构成，CPU单元还包括外围芯片、总线接口及有关电路。内存主要用于存储程序及数据，是PLC不可缺少的组成单元。 

　　在使用者看来，不必要详细分析CPU的内部电路，但对各部分的工作机制还是应有足够的理解。CPU的控制器控制CPU工作，由它读取指令、解释指令及执行指令。但工作节奏由震荡信号控制。运算器用于进行数字或逻辑运算，在控制器指挥下工作。寄存器参与运算，并存储运算的中间结果，它也是在控制器指挥下工作。