MC02412000000
11131280-11173637
MC02412000000
11131280-11173637
MC02412000000
11131280-11173637
为使您可以限制由极短的更新时间引起的网络负载，将为 IRT 数据组态更新组。如果只有
几台设备需要极短的更新时间，则将这些设备分配到个更新组。每个额外的更新组的更
新时间都是前一个组的 n 倍，其中 n 可以组态。这意味着数据更新频率降低且网络负载减少。
在 STEP 7 V5.4 中，仅规划一个更新组。
IRT 与实时和 TCP/IP 通讯一起运行。
除了在更新时间内为 IRT 通讯保留了固定带宽外，在更新时间内还允许进行 RT 通讯和 TCP/
IP 通讯。
在 RT 通信（实时通信）中，在 IO 控制器和 IO 设备之间传输周期性数据，但是，无法获得
佳的同步效果。
未同步的 IO 设备将使用 RT 通讯自动交换数据。
由于也可进行 TCP/IP 通讯，因此可以传送其它非实时数据或组态/诊断数据。
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