西门子模块代理商|阳江PLC模块代理商
概述
Legal frameworkMachine manufacturers and manufacturing plants must ensure thattheir machines or plants cannot cause danger due to malfunctions inaddition to the general risks of electric shock, heat orradiation.
In Europe, for example, compliance with the Machinery Directive2006/42/EC is legally stipulated by the EU Directive on Safety andHealth at Work. In order to ensure compliance with this directive,it is recommended that the corresponding harmonized Europeanstandards are applied. This triggers the "assumption of conformity"and gives manufacturers and operators the legal security in termsof compliance with both national regulations and EU directives. Themachine manufacturer uses the CE marking to document the compliancewith all relevant directives and regulations in the free movementof goods.
Safety-related standards西门子模块代理商|阳江PLC模块代理商Functional safety is specified in various standards. For example,EN ISO 12100 specifies standards pertaining to machinesafety (risk assessment and risk reduction). IEC 61508specifies basic re for electronic and programmablesafety-related systems. EN 62061 (only applicable forelectrical and electronic control systems) andEN ISO 13849‑1, which has replaced EN 954‑1, definethe functional and safety-related re of safety-orientedcontrol systems.
The above-mentioned standards define different safety rethat the machine has to satisfy in accordance with the risk,frequency of a dangerous situation, probability of occurrence andthe opportunities for recognizing impending danger.
EN ISO 13849‑1: Performance Level PLa ... e; Category B, 1 ... 4
EN 62061: Safety Integrity Level SIL 1 ... 3
Integrated safety functions act much faster than those of aconventional design. The safety of a machine is increased furtherwith Safety Integrated. Furthermore, thanks to the faster method ofoperation, safety measures controlled by integrated safety systemsare perceived as less of a hindrance by the machine operator,therefore significantly reducing the motivation to consciouslybypass safety functions.
功能
The safety functions integrated in SIMATIC MICRO-DRIVE aredescribed below.
Safety functions integrated in the SIMATIC MICRO-DRIVE drives(integrated in the failsafe variants, e.g. PDC100F)The large number of safety functions integrated in the SIMATICMICRO-DRIVE drive system in combination with the sensors and safetycontrol required for the safety function contribute to theimplementation of highly effective, practical personnel and machineprotection.
They comply with the re of the following safetycategories:
PL d and Category 3 according toEN ISO 13849‑1
SIL 2 according to IEC 61508 andIEC 61800‑5‑2西门子模块代理商|阳江PLC模块代理商
The Safety Integrated functions are generally certified byindependent institutes. You can obtain the corresponding testcertificates and manufacturer's declarations from your Siemenscontacts.
The integrated safety functions that are currently available aredescribed below. Their functional safety satisfies the redefined in the international standard IEC 61800‑5‑2 forvariable-speed drive systems.
The safety functions integrated into the SIMATIC MICRO-DRIVE drivesystem can be roughly divided into two categories:
Functions forsafely stopping a driveSafe Torque Off (STO)
Safe Stop 1 (SS1)
Safely-Limited Speed (SLS)
Safely-Limited Torque (SLT 1))
Safe Speed Monitor (SSM)
1) Only for PDC100F.
Safe Torque Off (STO)西门子模块代理商|阳江PLC模块代理商The STO function is the most common and basic drive-integratedsafety function. It ensures that no tor energy cancontinue to affect a motor and prevents unintentionalstart-ups.
Effect
This function is a mechanism that prevents the drive fromrestarting unexpectedly, in accordance with EN 60204‑1,Section 5.4. The STO function suppresses the drive pulses(corresponds to Stop Category 0 according to EN 60204‑1). Thedrive is reliably tor This state is monitored internallyin the drive.
Application
STO has the immediate effect that the drive cannot supply anytor energy. STO can be used wherever the drive willnaturally reach a standstill due to load torque or friction in asufficiently short time or when "coasting down" of the drive willnot have any relevance for safety.
STO makes it possible fo西门子模块代理商|阳江PLC模块代理商r persons to work safelywhen the protective door is open (restart interlock) and is used onmachines/installations with moving axes, e.g. on handling orconveyor systems.
Customer benefits
Some of the advantages of the Safety Integrated Function STO overconventional safety technology with electromechanical switchgearinclude the elimination of separate components as well as of thework that would be required to wire and service them, i.e. nowearing parts as a result of the electronic shutdown. Because ofthe fast electronic switching times, the function provides ashorter reaction time than the conventional solution comprisingelectromechanical components. When STO is triggered, the converterremains connected to the network and can be fullydiagnosed.西门子模块代理商|阳江PLC模块代理商
The SS1 function causes a motor to stop rapidly and safely andswitches the motor to tor mode after coming to a standstillby activating STO.
The SS1 function can safely stop the drive in accordance withEN 60204‑1, Stop Category 1. When the SS1 function isselected, the drive brakes autonomously along a quick stop ramp andautomatically activates the Safe Torque Off functions when the setsafe delay time has expired.
Application西门子模块代理商|阳江PLC模块代理商
The SS1 function is used when, in the event of a safety-relevantincident, the drive must stop as as possible withuent transition into the STO state (e.g. EMERGENCY STOP). Itis thus used to bring large centrifugal masses to a stop as as possible for the safety of the operating personnel, or to brakemotors at high speeds as as possible. Examples of typicalapplications are saws, grinding machine spindles, centrifuges,winders and storage and retrieval machines.
The targeted stopping of a drive by means of SS1 reduces the riskof danger, increases the productivity of a machine, and allows thesafety clearances in a machine to be reduced. The principle is tobring the drive actively to a standstill, compared with just usingthe STO function. Complex mechanical brakes that are susceptible towear are not normally required to brake the motor.
The SLS function monitors the drive to ensure that it does notexceed a preset speed or velocity limit.
The SLS function monitors the drive against a parameterized speedlimit. Four different limit values can be selected. The speedsetpoint is not influenced independently. After SLS has beenselected, the higher-level control must bring the drive down belowthe selected speed limit within a parameterizable time. If thespeed limit is exceeded, a customizable drive-integrated faultreaction occurs.
The SLS limit stage 1 can be multiplied by a factor that istransferred in 16-bit resolution via PROFIsafe. This allows analmost unlimited number of limits to be specified.
The SLS function is used if people are in the danger zone of amachine and their safety can only be guaranteed by reduced speed.Typical application cases include those in which an operator mustenter the danger zone of the machine for the purposes ofmaintenance or setting up, such as a winder in which the materialis manually threaded by the operator. To prevent injury to theoperator, the roller may only spin at a safely reduced speed. SLSis often also used as part of a two-stage safety concept. While aperson is in a less critical zone, the SLS function is activated,and the drives are only stopped in a smaller area with higherpotential risk. SLS can be used not only for operator protection,but also for machinery protection, e.g. if a maximum speed must notbe exceeded.
The SLS function can 西门子模块代理商|阳江PLC模块代理商contribute to a significantreduction in downtime, or greatly simplify or even acceleratesetup. The overall effect achieved is a higher availability of themachine. Moreover, external components such as speed monitors canbe omitted.
The SLT function monitors the current/torque of a motor.
Effect西门子模块代理商|阳江PLC模块代理商
The SLT function allows the torque to be reduced within a definedperiod of time. If the torque exceeds the SLT monitoring limit, thedrive responds with a "Safe Stop". The stop responses STO or SS1can be specified via parameters.
In the simplest case, this function is used for force limiting whenopening and closing a protective door on a machine.
The SLT function avoids the use of external hardware for measuringand limiting the force and the associated wiring effort.
The SSM function warns when a drive is working below an adjustablespeed limit. As long as it remains below the threshold, thefunction issues a safety-related signal.
If a speed value drops below a parameterized limit, asafety-related signal is generated. This can, for example, beprocessed in a safety controller to respond to the event byprogramming, depending on the situation.
With the SSM function, in the simplest case, a safety door can beunlocked if the speed drops below a non-critical level. Anothertypical example is that of a centrifuge that may be filled onlywhen it is operating below a configured speed limit.
Unlike SLS, there is no drive-integrated fault reaction when thespeed limit is exceeded. The safe feedback can be evaluated in asafety control unit, allowing the user to respond appropriately tothe situation.
The STO safety function for SIMATIC MICRO-DRIVE can be activatedvia terminals, e.g. for use of a conventional safety circuit.
For standalone safety solutions for small to medium sizedapplications, it is fre sufficient that the various sensingcomponents are directly hardwired to thedrive.西门子模块代理商|阳江PLC模块代理商
For integrated safety solutions, the safety-relevant se aregenerally processed and coordinated in the fail-safe SIMATICcontroller. In this case, the system components communicate via thePROFINET fieldbus. The safety functions are controlled via the safePROFIsafe communication protocol.
The SIMATIC MICRO-DRIVE drives can be easily integrated into theplant or system topology.
PROFIsafe (only for the failsafe variants, e.g. PDC100F)SIMATIC MICRO-DRIVE drives support the PROFIsafe profile based onPROFINET.
PROFIsafe is an open communications standard that supports standardand safety-related communication over the same communication path(wired or wireless). A second, separate bus system is therefore notnecessary. The telegrams that are sent are continually monitored toensure safety-relevant communication.
Possible errors such as telegrams that have been lost, repeated orreceived in the incorrect sequence are avoided. This is done byconsecutively numbering the telegrams in a safety-relevant fashion,monitoring their reception within a defined time and transferringan ID for transmitter and receiver of a telegram. A CRC (cyclicredundancy check) data security mechanism is also used.
The operating principle of SafetyIntegrated西门子模块代理商|阳江PLC模块代理商Two independent switch-offsignal paths
Two independent switch-off signal paths are available. Allswitch-off signal paths are low active. This ensures that thesystem is always switched to a safe state if a component fails orin the event of cable breakage. If a fault is discovered in theswitch-off signal paths, the STO or SS1 function (depending onparameter settings) is activated and a system restartinhibited.
Two-channel monitoringstructure
All the main hardware and software functions for Safety Integratedare implemented in two independent monitoring channels (e.g.switch-off signal paths, data management, data comparison). Acyclic crosswise comparison of the safety-relevant data in the twomonitoring channels is carried out.
The monitoring functions in each monitoring channel work on theprinciple that a defined state must prevail before each action iscarried out and a specific acknowledgement must be made after eachaction. If these expectations of a monitoring channel are notfulfilled, the drive coasts to a standstill (two channel) anda西门子模块代理商|阳江PLC模块代理商
随着我国电力产业的发展，对配套产业的要求越来越高。作为电力配套产业的重要组成部分，电线电缆制造商也面临着新的需求，以满足我国电力发展的需要。未来，电线电缆公司应努力改进技术，节约原材料，开发新的环保材料。在当今市场形势下，电线消费者对家居装饰电线安全环保性能的要求越来越高，传统电线电缆的市场比例越来越低，许多厂家面对这样的市场形势，积推进转型发展，从传统电线电缆到环保电线电缆，已成为不争的事实。接下来，让我们来看看他们的特点。
环保电线电缆西门子模块代理商|阳江PLC模块代理商电线电缆
环保电线电缆不同于普通电线电缆，不仅材料和工艺不同，而且性能和质量标准与普通电线电缆非常不同。主要体现在以下几个方面：
1、阻燃阻燃：环保电线电缆的阻燃耐火性符合我国消防标准。发生电气火灾时，电线电缆不易燃烧。同时，在持续燃烧的情况下，可以保证一定时间内电控系统的正常运行，大限度地减少电线电缆燃烧后火焰的扩散。
二、电线电缆本身毒性低：环保电线电缆由于原材料的特殊性，电线电缆绝缘和外护套不含铅、镉等对人体有害的重金属，可以大限度地保证自身的健康和安全。西门子模块代理商|阳江PLC模块代理商3、电线电缆不会分解腐蚀性气体：环保电线电缆采用无污染的新型特种材料，在使用过程中不会因高温等原因产生多种有害气体，对设备仪器的危害较小，显示出环保电线电缆的环保特点。
4、无污染：环保电线电缆使用的绝缘材料和护套材料均为绿色环保材料。在保证**稳定电气性能和物理机械功能的同时，保证了电线电缆的安全性能，避免了废弃电线电缆焚烧后形成的“二次污染”。
上述就是电线电缆厂家为您介绍的有关环保电线电缆普通电线电缆的特征相比的内容，对此还有什么不了解的，欢迎前来咨询我们的网站，我们会有专业的人员为您讲解。西门子模块代理商|阳江PLC模块代理商
关键词
西门子总代理商 , 西门子模块代理商 , 西门子PLC代理商
更新时间
上海兆维智控科技有限公司已认证
- 钻石会员
- 第5年
- 统一社会信用代码
- 91310120MAEBD1A69W
- 成立日期
- 1998年01月12日
主营产品
西门子授权PLC模块、电线电缆、触摸屏中国总代理商
经营范围
一般项目：技术服务、技术开发、技术咨询、技术交流、技术转让、技术推广；软件开发；电子元器件与机电组件设备销售；电子元器件批发；工业自动控制系统装置销售；电气设备销售；电气设备修理；仪器仪表销售；仪器仪表修理；工业机器人安装、维修；工业机器人销售；专用设备修理；计算机及通讯设备租赁；机械设备租赁；电子产品销售；五金产品零售；金属材料销售；办公设备耗材销售；互联
公司简介
15724910837是中国西门子的合作伙伴，公司主要从事工业自动化产品的集成,销售和维修，是全国知名的自动化设备公司之一。公司坐落于中国一线城市上海市，我们真诚的希望在器件的销售和工程项目承接、系统开发上能和贵司开展多方面合作。以下是我司主要代理西门子产品，欢迎您来电来函咨询，我们将为您提供优惠的价格及快捷细致的服务！西门子华东区域代理SIEMENS 可编程控制器 1、 SIMATIC S7 系列 PLC：S7-200、S7-1...