MVI56-PDPMV1 隔离器

选型注意事项

　　S7-300PLC的选型原则是据生产工艺所需的功能和容量进行选型，并考虑维护的方便性、备件的通用性，以及是否易于扩展和有无特殊功能等要求。选型时具体注意以下几方面：

　　(1)有关参数确定。一是输入/输出点数(I/O点数)确定。这是确定PLC规模的一个重要依据，要根据实际情况留出适当余量和扩展余地。二是PLC存储容量确定。注意当系统有模拟量信号存在或要进行大量数据处理时，其存储容量应选大一些。

　　(2)系统软硬件选择。一是扩展方式选择，S7-300PLC有多种扩展方式，实际选用时，可通过控制系统接口模块扩展机架、Profibus-DP现场总线、通信模块、运程I/O及PLC子站等多种方式来扩展PLC或预留扩展口;二是PLC的联网，包括PLC与计算机联网和PLC之间相互联网两种方式。因S7-300PLC的工业通信网络淡化了PLC与DCS的界限，联网的解决方案很多，用户可根据企业的要求选用;三是CPU的选择，CPU的选型是合理配置系统资源的关键，选择时根据控制系统对CPU的要求(包括系统集成功能、程序块数量限制、位资源、MPI接口能力、是否有

　　PROFIBUS-DP主从接口、RAM容量、温度范围等)，并好在西门子公司的技术支持下进行，以获得合理的选型;四是编程软件的选择，这主要考虑对CPU的支持状况，我们的体会是：STEP7V4.0对有些型号的CPU不支持，硬件组态时会发生故障出错，而STEP7V5.0则不存在这种问题。

　　二、设计及使用注意事项

　　1. 设计注意事项

　　设计时主要应注意以下几方面：

　　(1)PLC输出电路中没有保护，因此在外部电路中应设置串联熔断器等保护装置，以防止负载短路造成PLC损坏。熔断器容量一般为0.5A。

　　(2)PLC存在I/O响应延迟问题，因此在快速响应设备中应加以注意。MPI通信协议虽简单易行，但响应速度较慢。

　　(3)编制控制程序时，好用模块式结构程序。这样既可增强程序的可读性，方便调试和维护工作;又能使数据库结构统一，方便WinCC组态时变量标签的统一编制和设备状态的统一显示。

　　(4)硬件资源。要合理配置硬件资源，以提系统可靠性。如PLC电源配电系统要配备冗余的UPS不间断电源，以排除停电对全线运行的不利影响。又如对电机的控制回路要进行继电器隔离，以外部负载对I/O模块的可能损坏。另外，系统设备要采用独立的接地系统，以减少杂波干扰。

KEYENCE INTERFACE MODULE EG-547 *  IN BOX*

KEYENCE Interface Display Screen CV-551 free ship

KEYENCE Industrial   CV200M CCD camera 1PC CV-200M

Keyence Industrial SR-510 Long-Range Compact 2D Barcode Reader Module Sensor

Keyence Image system CV-3001 good in condition for industry use

KEYENCE image recognition sensor probe IV-500MA

KEYENCE IMAGE PROCESSOR SYSTEM CA-DC21E XG-7002P XG-E700 CA-DRW10F *TESTED*

KEYENCE Image processer CV-550 good in condition for industry use

Keyence IL-S025 CMOS multi-function analogue laser sensor

Keyence Illumination Controller CADC100   In Box #3587534

Keyence Illumination Controller CA-DC100   in box

Keyence Illumination Controller CADC100   In Box

keyence IL-600 Laser Sensor   In Box #2128685

keyence IL-600 Laser Sensor IL Intelligent-L

Keyence IL-300 CMOS multi-function analogue laser sensor

KEYENCE IL-300 CMOS LASER SENSOR  

KEYENCE IL-300 CMOS LASER SENSOR INTELLIGENT LASER SENSOR   ( EMS )

Keyence IL-1550 Panel Mount Laser Amplifier Expansion Expansion Unit

keyence IL-1500 with keyence IL-100 and mitutoyo 215-153-10

Keyence IL-1500 Panel Mount Laser Amplifier

Keyence IL-1500 Panel Mount Laser Amplifier

KEYENCE IL-1050 LASER SENSOR AMP UNIT ANALOG MULTI IL-SERIES ( ,  ,  )

KEYENCE IL-1000 Laser Sensor   IN BOX #5269963

KEYENCE IL-1000 Laser Sensor   IN BOX

KEYENCE IL-1000 IL SERIES ANALOG LASER SENSOR  

Keyence IL-100 Laser Sensor, Intelligent L Series, 100mm Reference Distance

Keyence IL-100 Laser Sensor

Keyence- IL-030 Laser Sensor

Keyence IG-1000 intelligent series amplifier unit

Keyence IG-1000 Amplifier Unit, DIN Rail Type

Keyence IG-028 Multi-Purpose CCD Laser Micrometer Sensor Head

Keyence IG 1050 I/O Module, Din Rail Mount

KEYENCE IB-30 SENSOR HEAD *  IN A BOX*

KEYENCE IB-1000 PHOTOELECTRIC SENSOR *  IN A BOX*

KEYENCE HMI VT3-W4M good in condition for industry use

KEYENCE HMI VT3-V10 good in condition for industry use

Keyence HMI VT3-S10 95%   in Box Free Ship

KEYENCE HMI VT2-8TB good in condition for industry use

KEYENCE HMI VT2-8TB

Keyence HMI Touch Screen MT-260 free ship

KEYENCE HMI Touch Panel VT2-8TB tested

KEYENCE HMI Touch Panel VT2-8TB tested

KEYENCE HMI Touch Panel VT2-8TB free ship

KEYENCE HMI Touch Panel VT2-5SB good in condition for industry use

KEYENCE HMI Touch Panel VT2-5SB

KEYENCE HI-SPEED DIGITAL COLOR CCD IMAGE RECEIVING ELEMENT CV-035C *NIB*

Keyence Hi-Res Laser Barcode Reader BL-601HA  

Keyence High-speed Laser Scan Micrometer LS-5040 and LS-5500 Set

Keyence High-Accuracy CCD Micrometer LS-7601 with LS-7010MT and LS-7010MR

Keyence High-Accuracy CCD Digital Micrometer LS-7001 + TWO LS-7010 Sensor Heads

Keyence high speed digital camera CV-035C Color CCD

Keyence High ResCamera CV-025

Keyence High Res Camera CV-025

KEYENCE High precision contact digital sensor GT2-71MCN  

Keyence High Accuracy Contact Sensor GT-H10   IN BOX #6130591

Keyence High Accuracy Contact Sensor GT-H10   IN BOX

Keyence high accuracy contact sensor and amplifier GT-H10 GT-71A

KEYENCE HI-15T Free Ship

KEYENCE HI-07K PAM + PWM INVERTER 200-240 VAC 3PH 0.1-400Hz

Keyence HC-P1E Sensor Controller Pendant Display  

Keyence HC-50 Control Module working

KEYENCE HC-50 & HC-55 (4UNITS) CONTROL MODULE POWER ON TESTED

KEYENCE GV-H65 CMOS Photo Laser Sensor with GV-21 Laser Sensor Amplifier

Keyence GV-H450(10M) CMOS laser sensor

KEYENCE GV-H450 SENSOR ATTACHED GV-21P SENSOR AMPLIFIER

KEYENCE GV-H450 LASER SENSOR 10-30 V DC,  

KEYENCE GV-H450 CMOS LASER SENSOR HEAD GVH450

KEYENCE GV-H450 CMOS LASER SENSOR HEAD GVH450

Keyence GV-H450 CMOS Laser Sensor Head

Keyence GV-H45 CMOS Photo Laser Sensor Digital Head  

Keyence GV-H45 CMOS Laser Sensor  !!

KEYENCE GV-H130L DIGITAL CMOS LASER SENSOR RANGE: 1M,  

KEYENCE GV-H130L

KEYENCE GV-H130 LASER SENSOR SEMICONDUCTOR

KEYENCE GV-H130 Laser Sensor   IN BOX #4841860

KEYENCE GV-H130 Laser Sensor   IN BOX

Keyence GV-H130 Laser Sensor Head Mid-Range 55-130mm  

KEYENCE GV-H130 LASER SENSOR HEAD MID-RANGE 55-130MM 655NM NIB

Keyence GV-H130 Laser Sensor

KEYENCE GV-H130 DIGITAL CMOS LASER SENSOR HEAD GVH130  

Keyence GV-H130 CMOS Laser Sensor with GV-21P Amplifier

KEYENCE GV-H1000 Laser Sensor   In Box

KEYENCE GV-H1000 Laser Sensor   In Box

KEYENCE GV-H1000 Laser Sensor   In Box

KEYENCE GV-H1000 Laser Sensor   IN BOX

KEYENCE GV-H1000 LASER SENSOR HEAD ULTRA LONG DISTANCE,  

KEYENCE GV-21P LASER SENSOR, 10-30V DC, 2200 MW MAX,  

KEYENCE GV-21P LASER SENSOR AMPLIFIER DGTL CMOS 10-30VDC PNP 2M NIB

Keyence GV-21P Laser Sensor Amplifier 10-30VDC  

KEYENCE GV-21P DIGITAL CMOS LASER SENSOR AMPLIFIER W/ GV-H450 LASER SENSOR HEAD

Keyence GV-21 Laser Sensor   IN BOX

KEYENCE GUAGE SENSOR GT-10H, AMPLIFIER GT-71A, INTERFACE UNIT DL-RB1

Keyence GT-H22 precision contact measurement sensor

Keyence GT-H22

KEYENCE GT-H10L Contact Sensors   IN BOX #2610041

KEYENCE GT-H10L Contact Sensors   IN BOX

Keyence GT-H10L

Keyence GT-H10 with GT-71A Amplifier

Keyence GT-A22 Sensor Head

KEYENCE GT-A22 GTA22 Over 95%   in box Free Ship

KEYENCE GT-A22 GTA22

KEYENCE GT-A10L Sensor Transceiver   in Box Free Ship

Keyence GT-75A & GT-H10 284

KEYENCE GT-72A PLC

Keyence GT-71AP Amplifier Unit, DIN Rail Type, PNP

Keyence GT-71A+ GT-H22

Keyence GT-71A + GT-H10L

Keyence GT2-P12F with Amp and cable (GT2-71N, GT2-CH5M)

Keyence GT2-H50 High Precision Contact Measurement Sensor

Keyence GT2-H32L High Precision Contact Measurement Sensor

Keyence GT2-H12L Sensor Head #   #