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Supreme-Ring协议是在工业以太网使用的冗余机制。Supreme-Ring协议和生成树协议有点相似，Supreme-Ring协议也定义了一种数据包，称为HELLO包，又称为WD包（WatchDogPackets)。交换机之间用HELLO包通信，在主交换机上动态选择主链路和备份链路。但是因为从中心桥到任何网段只有一个路径存在，所以桥回路被消除。
在工业冗余环网网络环境里,交换机不会立即开始转发功能,主交换机(Local)由手动,选择主链路和备份链路建立一个路径,由Supreme-Ring协议自动。一个工业冗余环网网络里面只能有一个主交换机(Local)。主交换机(Local)会定期发送配置信息，这种配置信息将会被所有的从交换机（Remote）发送。一旦网络结构发生变化，网络状态将会重新配置。
当主交换机(Local)之后，在转发数据包之前，所有端口都以阻塞方式启动。运用Supreme-Ring算法，主交换机(Local)选择低COST值的端口作为主链路，另一条COST值高的端口作为备份链路。备份链路不转发数据，只接收和处理HELLO包，处于热备（HotStandby）状态。从交换机（Remote）没有主链路和备份链路的区别。Supreme-Ring协议是一种简洁高效的冗余协议，能够保证环网在链路故障时，在300ms之内恢复网络通信。
厦门泰尼电气有限公司
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Telemecanique Altivar 5 125 HP 90KW ATV45D90N VS Drive
Bently Nevada 3300/36 Dual Temperature Monitor 330036
Fanuc Ltd A05B-2308-C307 IS Teach Pendant I.S.
SBC CHB25/50 Digital Drive S.B.C. 380VAC 16kW 16 kW
Square D 92346 Double Throw Safety Switch 600 Amp 600V
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TCI 100 HP Harmonic Guard 3H030A6L5A100 30 kVAR Filter
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Acme Transformer 167 kVA 240 x 480 120/240 V 1PH 167kVA
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