3TF6844-0CM7 SIMATIC NET,MM492-2LH 介质模块,SCALANCE X-400 附件,带 2 个 100 Gbit/s 单模 SC,可热插拔,INSCRIPTION FIELD 6GK5492-2AP00-8AA2 SIMATIC NET,MM492-2LH+ 介质模块,SCALANCE X-400 附件,带 2 个 100 Gbit/s 单模 SC,可热插拔,INSCRIPTION FIELD 6GK5492-2AQ3TF6844-0CM700-8AA2 SCALANCE X-400 ACCESSORY, MEDIA MODULE MM492-2ELH, 2 X 1GBIT/S SINGLEMODE SC, HOT SWAPABLE, INSCRIPTION FIELD 6GK5495-8BA00-8AA2 SIMATIC NET,EM495-8 扩展模块,SCALANCE X-400 附件,带 8 个 10/100 Mbit/s RJ45 端口,可热插拔,带保护盖 CV490 6GK5496-4MA00-8AA2 SIMATIC NET,EM496-4 扩展模块,SC3TF6844-0CM7ALANCE X-400 附件,带 4 个 100 Mbit/s 介质模块插槽,可热插拔,带保护盖 CV490 6GK5498-0AA00-0AA0 SIMATIC NET, SCALANCE X-400 附件,10 张 DIN A4 标签,绿色, 10 条/张,预穿孔,用于使用激光打印机进行打印 每包 10 张 6GK5498-1AA00-0AA3TF6844-0CM70 SIMATIC NET,SCALANCE X-400 备件,4 针和 5 针端子套件,直向,带锁定片,每包 10 张 于生成与块相关的消息的SFB如何响应故障.............................................. 22-25 22.12 使用SFC生成与块相关的消息简介................................................................ 22-26 22.13 使用SFC17 “ALARM_SQ”生成可确认的与块相关的消息以及使用SFC18 “ALARM_S”生成*确认的与块相关的消息................................................ 22-293TF6844-0CM7 22.14 使用SFC19 “ALARM_SC”查询上一ALARM_SQ/ ALARM_DQ进入事件消息的确认状态.......................................................... 22-32 22.15 使用SFC 107 “ALARM_DQ”和108 “ALARM_D” 生成可确认和*确认的块相关消息............................................................ 22-33 22.16 使用SFC105 “READ_SI”读取动态系统资源.................................................. 22-35 22.17 使用SFC106 “READ_SI”读取动态系统资源.................................................. 22-38 23 IEC定时器和IEC计数器 23-1 23.1 使用3TF6844-0CM7SFB 3“ 6GK5602-0B