当因超时引起STOP B到SH（Safe standstill）制动期间，SBR（安全减速监控Safe acceleration monitoring）安全监控功能无效。
下文中介绍安全集成功能中特殊应用，及如何调整。系统无法预见的错误，非正常状态（如：系统NC，PLC宕机）可能增加安全相应时间（如：延迟制动）如配置SINUMERIK 840D sl (NCU 720.2PN resp. NCU 730.2PN)控制器系统。

详细描述：
状态转换的步骤：

STOP C，D，E由内部或外部停激活的。
在设定的时间内转换成SBH(Safe operating stop) 状态。
超出SBH定位窗口时系统触发STOP B。
STOP B制动时间内，达到速度允差范围，自动转入STOP A状态，脱离制动状态。
在STOP B制动状态，SBR监控功能无效。即在STOP B到SH时，驱动速度给定为0，但监控功能无效。轴减速期间的不再触发内部停。转入SH状态STOP A的SBR监控功能位立即生效。
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