OpenSafety技术

 
SSC: Safety Stack Control: control of the openSAFETY software such as stack initialization
安全协议控制:OpenSafety软件控制,例如协议栈初始化   
SNMT: Safety Network Management: transmission, reception and processing of network management commands as well as distribution of the safety addresses
安全网络管理:网络管理命令的以安全地址方式传输、接收和处理   
SCM: Safety Configuration Manager: configuration, verification and monitoring of safety nodes
安全配置管理器:配置、认证和监视安全节点   
SPDO: Safety Process Data Objects: cyclic exchange of process data and verification of time synchronization
安全过程数据对象:等时同步的过程数据和证实的循环交换   
SSDO: Safety Service Data Objects: server/client communication to access the object directory via the network
安全服务数据对象:通过服务器/客户端方式访问对象字典   
SOD: Safety Object Dictionary: access to the Safety Object Directory
安全对象字典:访问安全对象字典   
SFS: Safety Frame Serialization: serialization and deserialization of the safety frames
安全帧封装:安全帧的解包和打包   
SNS: Safety Node State: management of the operating states of the safety nodes
安全节点状态:对安全节点的操作状态的管理   
SERR: Safety Error Handling: logging of stack-internal errors
安全错误处理:协议-内部错误   
SCFM: Safety Control Flow Monitoring: monitoring of the correct program flow in accordance with SIL-3
安全控制流监控：依照SIL3对正确程序流进行监控 

Hardware concepts for POWERLINK Safety

The Safety Integrity Level (SIL) that can be achieved with the openSAFETY software mainly depends on the hardware architecture used. The openSAFETY software was created for use in SIL-3 devices. To meet the requirements of SIL-1, it is sufficient for example to use one single Safety Controller (SC) that carries out the safe application and the openSAFETY stack. To achieve SIL-3, the Safety Controller must also be designed as redundant.

POWERLINK Safety的硬件概念

OpenSafety软件可以实现安全完整性等级SIL，这主要取决于所使用的硬件架构。OpenSafety软件是针对SIL-3设备的使用而创建的。例如，为了满足SIL-1的要求，使用一个执行安全应用程序及openSAFETY协议的安全控制器（SC）就足够了。为了实现SIL-3，安全控制器就必须设计冗余。

功能概览

With its function modules, the openSAFETY software enables the execution of all communication and back-up mechanisms necessary for POWERLINK Safety. This includes the provision of a Safe Object Directory (SOD), Safe Process Data (SPDO) and Safe Service Data (SSDO) as well as time and CRC monitoring of the data packages.

openSAFETY软件的功能模块能够执行POWERLINK Safety所需的所有通信及备份机制。这包括建立一个安全对象字典（SOD）、安全过程数据对象（SPDO）、安全服务数据对象（SSDO）以及数据包的时间与CRC监控。

Zipping and unzipping of the POWERLINK Safety frames in the transmission messages of the non-safe transmission protocol is carried out by the functions of the hardware-level firmware (SHNF) provided by the user. The inputs and outputs of the POWERLINK Safety device must also be controlled by a special safety application. The SOD of the openSAFETY software is used as the data interface to the safety application.

在非安全传输协议的传输信息中，POWERLINK Safety帧的压缩与解压缩是由用户提供的硬件层固件（SHNF）的一些功能来完成的。POWERLINK Safety设备的输入与输出还必须通过一个专门的安全应用程序来控制。openSAFETY软件的SOD用来作为安全应用程序的数据接口。