RADISYS EPC-5 EPC5数字量输入卡件

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中文资料：

RADISYS EPC-5 EPC5能够在冗余传输模式下运行。当跳线E5的引脚1和2移除分流器时，板被配置为冗余模式。在冗余传输模式下，无论动态数据包大小如何，每个数据包都将传输两次。接收节点评估每个冗余传输。如果在第一次传输中没有检测到错误，则使用它来更新板载存储器，并且丢弃第二次传输。然而，如果第一次传输确实包含错误，则第二次传输用于更新板载存储器，前提是它没有传输错误。RADISYS EPC-5 EPC5

如果在两次传输中都检测到错误，则不会使用传输，并且数据将完全从网络中删除。RADISYS EPC-5 EPC5如果在任一传输中检测到错误，将设置坏数据位（LCSR的位01）。

冗余传输模式大大减少了从网络中丢弃任何数据的机会。然而，冗余传输模式也降低了有效的网络传输速率。单个L字（4字节）传输速率从43Mbyte/sec的非冗余速率下降。至大约20兆字节/秒。16L字（64字节）的传输速率从174Mbyte/sec的非冗余速率下降。到87兆字节/秒的冗余率RADISYS EPC-5 EPC5

英文资料：

The RADISYS EPC-5 EPC5 is capable of operating in a Redundant Transfer mode. The board is configured for redundant mode when pins 1 and 2 of jumper E5 has the shunt removed. While in the redundant transfer mode, each packet will be transferred twice, regardless of the dynamic packet size. The receiving node evaluates each of the redundant transfers. If no errors are detected in the first transfer, it is used to update the on-board memory and the second transfer is discarded. If however the first transfer does contain an error, the second transfer is used to update the on-board memory provided it has no transmission errors.RADISYS EPC-5 EPC5

If errors are detected in both transfers, the transfers will not be used and the data is completely removed from the network. RADISYS EPC-5 EPC5The Bad Data bit (Bit 01 of the LCSR) will be set if an error is detected in either transfer.

Redundant transfer mode greatly reduces the chance that any data is dropped from the network. However, the redundant transfer mode also reduces the effective network transfer rates. The single Lword (4 byte) transfer rate drops from the non-redundant rate of 43 Mbyte/sec. to approximately 20 Mbytes/sec. The 16 Lword (64 byte) transfer rate drops from the non-redundant rate of 174 Mbyte/sec. to the redundant rate of 87 Mbyte/secRADISYS EPC-5 EPC5

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