从历史上看，传统的保障系统强调了绝对的操作员安全，以牺牲生产率为代价。然而，尽管努力使设备“绝对安全”，高度动机的运营商寻求生产力改进往往覆盖传统安全系统，大大增加了事故的几率。因此，即使是刚性安全解决方案也无法保证绝对安全。
更现代，有效的保障策略是评估从面向任务的角度使用设备的使用（即，运营商如何与机器互动？）。面向任务导向的方法为使用依赖于智能自动化组件的集成系统解决方案。这使操作员损伤的风险最大限度地减少了机器的特定操作模式，同时允许操作员与使用诸如物理防护等的绝对安全措施和互锁的绝对安全措施相比有效地工作。例如，现代安全系统允许操作员和维护人员通过在执行器速度，力和扭矩上设定可编程限制来获得操作机器工作区，以减轻这些设备受伤的风险。
Justification of this modern approach to safety can be found in studies in Sweden and Japan regarding robotic accidents. The studies concluded that many robot accidents do not occur under normal operating conditions, but rather during programming, maintenance, repair, testing, set-up or adjustment. In most instances, work procedures required the operator or maintenance worker to temporarily enter the robot's working envelope, where unintended operations could result in injuries. Perimeter guarding or light curtains are temporarily overridden, exposing the worker to possible injury upon entering the work zone while the machine is still operational. In contrast, a modern safety approach respects the behavior of factory personnel and implements safety solutions that allow safe access to work zones. This approach to safety is allowing significant improvements in manufacturing productivity.
Many manufacturers have come to view an intelligent safety strategy as a competitive advantage rather than a cost burden. In addition, ensuring worker safety directly supports manufacturers’ initiatives to limit liability exposure and to improve their public images. From ARC’s perspective, modern, intelligent safety systems directly improve the bottom line.
Modern, intelligent safety solutions are usually associated with Safety programmable logic controllers (PLCs) that replace conventional hard-wired safety relays. However, far more important to productivity improvements are the avoidance of unintended axis movement, and “Safe Motion” that reduces the risk of injury to operators by allowing continued, but limited axis movement. In addition, the use of programmable safety logic greatly increases the flexibility of a safety system. Thanks to these benefits, Safety PLCs and Safe Motion have become permanent parts of modern, intelligent safety concepts.
当前安全标准允许的集成configurable safety systems directly in servo drives. This embedded functionality in the drives makes it possible for machine builders to incorporate safety strategies that improve operator productivity. With safe drives, safety solutions are becoming less complex, with far fewer cables and connections, resulting in reduced design, commissioning and installation costs.
Recommendations
ARC recommends that manufacturers specify machinery utilizing flexible, programmable safeguarding subsystems to allow for rapid reconfiguration of manufacturing processes. Further, factory workers and unions need to be educated so they can be active participants in designing processes with intelligent safety technology, rather than just cling to a “lockout only” philosophy. Machine control architecture is very important when seeking the benefits of Safe Motion, Safe Stopping, and Safety PLCs. Be sure to use machine builders that are on the forefront of intelligent safety.
保护解决方案范围超越安全继电器
安全PLC.可编程逻辑控制器额定到SIL 3级别
Safe StoppingServo drives and AC drives focused on Stopping safety functions in accordance with EN60204-1 without use of external safety hardware
Safe Motion伺服和交流驱动器能够在动力安全区中加入慢速模式，降低扭矩和更高的速度响应。
Source: ARC Advisory Group
Sal Spada, sspada@arcweb.com, is Research Director,
Discrete Automation, at ARC Advisory Group Inc., in Dedham, Mass.
更现代，有效的保障策略是评估从面向任务的角度使用设备的使用（即，运营商如何与机器互动？）。面向任务导向的方法为使用依赖于智能自动化组件的集成系统解决方案。这使操作员损伤的风险最大限度地减少了机器的特定操作模式，同时允许操作员与使用诸如物理防护等的绝对安全措施和互锁的绝对安全措施相比有效地工作。例如，现代安全系统允许操作员和维护人员通过在执行器速度，力和扭矩上设定可编程限制来获得操作机器工作区，以减轻这些设备受伤的风险。
Justification of this modern approach to safety can be found in studies in Sweden and Japan regarding robotic accidents. The studies concluded that many robot accidents do not occur under normal operating conditions, but rather during programming, maintenance, repair, testing, set-up or adjustment. In most instances, work procedures required the operator or maintenance worker to temporarily enter the robot's working envelope, where unintended operations could result in injuries. Perimeter guarding or light curtains are temporarily overridden, exposing the worker to possible injury upon entering the work zone while the machine is still operational. In contrast, a modern safety approach respects the behavior of factory personnel and implements safety solutions that allow safe access to work zones. This approach to safety is allowing significant improvements in manufacturing productivity.
Many manufacturers have come to view an intelligent safety strategy as a competitive advantage rather than a cost burden. In addition, ensuring worker safety directly supports manufacturers’ initiatives to limit liability exposure and to improve their public images. From ARC’s perspective, modern, intelligent safety systems directly improve the bottom line.
Modern, intelligent safety solutions are usually associated with Safety programmable logic controllers (PLCs) that replace conventional hard-wired safety relays. However, far more important to productivity improvements are the avoidance of unintended axis movement, and “Safe Motion” that reduces the risk of injury to operators by allowing continued, but limited axis movement. In addition, the use of programmable safety logic greatly increases the flexibility of a safety system. Thanks to these benefits, Safety PLCs and Safe Motion have become permanent parts of modern, intelligent safety concepts.
当前安全标准允许的集成configurable safety systems directly in servo drives. This embedded functionality in the drives makes it possible for machine builders to incorporate safety strategies that improve operator productivity. With safe drives, safety solutions are becoming less complex, with far fewer cables and connections, resulting in reduced design, commissioning and installation costs.
Recommendations
ARC recommends that manufacturers specify machinery utilizing flexible, programmable safeguarding subsystems to allow for rapid reconfiguration of manufacturing processes. Further, factory workers and unions need to be educated so they can be active participants in designing processes with intelligent safety technology, rather than just cling to a “lockout only” philosophy. Machine control architecture is very important when seeking the benefits of Safe Motion, Safe Stopping, and Safety PLCs. Be sure to use machine builders that are on the forefront of intelligent safety.
保护解决方案范围超越安全继电器
安全PLC.可编程逻辑控制器额定到SIL 3级别
Safe StoppingServo drives and AC drives focused on Stopping safety functions in accordance with EN60204-1 without use of external safety hardware
Safe Motion伺服和交流驱动器能够在动力安全区中加入慢速模式，降低扭矩和更高的速度响应。
Source: ARC Advisory Group
Sal Spada, sspada@arcweb.com, is Research Director,
Discrete Automation, at ARC Advisory Group Inc., in Dedham, Mass.
![Mps035 Sm 1200x628 D[2]](https://img.automationworld.com/files/base/pmmi/all/image/2021/03/MPS035_SM_1200x628_D_2_.604a4a336bc60.png?auto=format%2Ccompress&bg=fff&fill-color=fff&fit=fill&h=146&pad=5&q=70&w=340)
