MCV41A0750-5A3-4-00

MCV41A0750-5A3-4-00 PLC受到干扰引起的功能性故障

自动化系统中所使用的各种类型PLC，是专门为工业生产环境而设计的控制装置。在设计和制造过程中采用了多层次抗干扰和元件措施，故具有较强的适应恶劣工业环境的能力、运行稳定性和较高的可靠性。因此一般不需要采取什么特殊措施就可以直接在工业环境使用。

PLC受到的干扰可分为内部干扰和外部干扰。在实际的生产环境下，外部干扰是随机的，与系统结构无关，且干扰源是无法的 只能针对具体情况加以限制。

内部干扰与系统结构有关。主要通过系统内交流主电路、模拟量输入信号等引起，通过精心设计系统线路或系统软件滤波等处理，可使内部干扰得到大限度的抑制。

PART4、PLC周期性死机

PLC周期性死机的特征是PLC每运行若干时间就出现死机或者程序混乱，或者出现不同的中断故障显示，重新启动后又正常。根据实践经验认为，该现象常见的原因是由于PLC机体长期积灰造成。

所以应定期对PLC机架插槽接口处进行吹扫。吹扫时可先用压缩空气或软毛刷将控制板上、各插槽中的灰尘吹扫净，再用95%酒精擦净插槽及控制板插头。清扫完毕后细心检查一遍，恢复开机便能正常运行。

PLC生产现场的抗干扰技术措施

通常从电源与接地保护、接线安排 屏蔽和抗噪声等4个方面着手考虑

PART1、电源与接地保护

PLC本身的抗干扰能力一般都很强。通常.将PLC的电源与系统的动力设备电源分开配线 对于电源线来的干扰，一般都有足够强的抑制能力。

但是电源干扰特别严重，可加接一个带屏蔽层的隔离变压器以减少设备与地之间的干扰，提高系统的可靠性。如果一个系统中含有扩展单元，则其电源与基本单元共用一个开关控制，也就是说，它们的上电与断电同时进行。

为了抑制附加在电源及输入端、输出端的干扰，应给PLC接地线 接地线线径要足够粗.接地电阻要小于4Ω，接地点应尽可能靠近PLC，并且接地点要与其它设备分开。对供电系统中的强电设备，其外壳、柜体、框架、机座及操作手柄等金属构件保护接地。

PLC内部电路包括CPU、存储器和其他接口共接数字地，外部电路包括A/D、D/A 等共接模拟地并用粗短的铜线将PLC底板与中央接地点星形联结防哚声干扰。PLC非接地工作时，应将PLC的安装支架容性接地以抑制电磁干扰。

MCV41A0750-5A3-4-00 

P92204670700 Model P92 Workstation For Windows

P0923DZ 30m, FO, USB Extender For Windows Machines, 240Vac

P0904AK 50 Series GCIO Interface w/o TS (EC96)

P0903CW Annunciator Keyboard

P0973BJ Fiber E'net Switch w/24 MT-RJ Ports & Uplink Ports

P0973EY Control Line I/F Cable for Enterasys Switches

K0173ZU Mesh Configuration Tool & Switch/Network Documents

P0973BP Redundant Pwr Supply for P0973BH/BJ/BK/BL Switches

P0973BN Two-Bay Power Supply Chassis for P0973BH/BJ/BK/BL

P0973BK 8 RJ45 & 8 MTRJ FO Port E'net Switch &Uplink Ports

P0973EY Control Line I/F Cable for Enterasys Switches

K0173ZU Mesh Configuration Tool & Switch/Network Documents

P0973BP Redundant Pwr Supply for P0973BH/BJ/BK/BL Switches

P0973BN Two-Bay Power Supply Chassis for P0973BH/BJ/BK/BL

P0917YZ FCP270 Control Processor

P0926MX Splitter / Combiner Kit (With 2 Modules)

P0926CP ZCP270 Control Processor

P0926DF ZCP270 Or ATS Fault Tolerant Connector

P0926MX Splitter / Combiner Kit (With 2 Modules)

P0926GV FBM231, Four Serial Ports, Redundant

P0926GU FBM230, Four Serial Ports, Single

P0926GG FBM224, 4 Modbus Channels

P0926GH FBM224 / FBM230 / FBM231 Compression PolyAmide TA

P0922QS FBM228 4 Port FOUNDATION Fieldbus H1 Module

P0922VC Compression Term Assy FBM228

P0922RK Redundancy Adapter For FBM228 and FBM222

P0916DB FBM2xx Type 1 Term Cable, 1 Meter

P0926TL FBM222 Profibus DP Module, 2 Ports

P0922RK Redundancy Adapter For FBM228 and FBM222

P0926TH FBM222 Termination Assembly (PVC material)

P0916DB FBM2xx Type 1 Term Cable, 1 Meter

P0917HD FBM223 Profibus DP, 2 Ports

P0917SY FBM223 Compression Termination Assembly

P0916DB FBM2xx Type 1 Term Cable, 1 Meter

P0926GX FBM233, 10/100 Mbps Ethernet, Redundant

P0926GW FBM232, 10/100 Mbps Ethernet

P0973CN 4-Slot Vertical FCP270/Expansion Baseplate

P0973CA FEM100 Module

P081000000GG 1 x 8 Mounting Structure

P0926MZ Shelf For Fiber Splitter / Combiner And TSC's

B21100000000 I/A IR Letterbug Configurator

X0179AZ Hexball Screwdriver

P0916TQ FCM2f communication card

P0917XV FBM215/218 Compression Termination Assembly

P0917XQ Redundancy Adapter For FBM216

P0917XV FBM215/218 Compression Termination Assembly

P0914TB FBM208 Redundant 0-20 Module w/Readback

P0917GZ FBM240, 8 Rednt. Rdy Chanl Dig Out w Readback

P0917YJ Redundancy Adapter For FBM240

P0917HU Term Assembly, FBM240, 80V - 5 Amp Relay

P0972ZA FCM100E, Field Comm Mod w/Fiber Optic

P0926DZ Power Connection Kit For FPS 400-24

B0700AA I/A Series V8.x Complete Paper Documentation Set

K0173WT I/A Series V8.x Document CD For Windows pdf

P0972TR 3 m, MMF, Fiber, MT-RJ To LC Adapter Cable

P0916MZ 2 Mbps Base To Base Cable, 1m

P0926KM Power Supply Output Cable - 121 cm (48 in)

P0926GS FCM100Et, Field Comm Mod w/Fiber Optic & TDR

P0972UN 0.5 m LC-LC Fiber Optic Jumper Cable, Gray

P0972VG 0.5 m LC-LC Fiber Optic Jumper Cable, Orange

P0972TR 3 m, MMF, Fiber, MT-RJ To LC Adapter Cable

P0972KW Fiber Optic Multimode Cable, MT-RJ/MT-RJ, 15 m

P0971SU 70 Series WS Cable Interface, 10 Ft

P0971SW 70 Series WS Cable Interface, 150 Ft

P0800MW GCIO Cable, Coiled

P0971DY 100 Ft Video Cable For Windows/Solaris

P0972KW Fiber Optic Multimode Cable, MT-RJ/MT-RJ, 15 m

P0973BU 0.25 m LC-LC Fiber Optic Jumper Cable, Gray

P0972ZQ 0.25 m LC-LC Fiber Optic Jumper Cable, Orange

P0972TR 3 m, MMF, Fiber, MT-RJ To LC Adapter Cable

P0972UN 0.5 m LC-LC Fiber Optic Jumper Cable, Gray

P0972VG 0.5 m LC-LC Fiber Optic Jumper Cable, Orange

P0972TR 3 m, MMF, Fiber, MT-RJ To LC Adapter Cable

P0926GJ FBM2xx Type 5 HypalonTermination Cable, 1 Meter

P0916DE FBM2xx Type 1 Term Cable, 10 Meters

P0916MZ 2 Mbps Base To Base Cable, 1m

P0926KM Power Supply Output Cable - 121 cm (48 in)

P0922YU Power Supply, FPS 400-24

P0926CM Power Cable

P0904HA Industrial Power Module, 2 LAMBDA

P0926HW 2 FCP Slots Vert. Baseplate, Time Strobe

P0916MZ 2 Mbps Base To Base Cable, 1m

P0926KM Power Supply Output Cable - 121 cm (48 in)

MCV41A0750-5A3-4-00