English to Czech Tech/Engineering Computers: Systems, Networks

(5.1)
Update times, Ta, other than the minimum transmission clock, are achieved by using a ReductionRatio, as given by the formula.

(5.2)
In the example in Figure 5-2 the minimum transmission clock resulting in an update time of 1 ms is required by the IO device D1.
A ReductionRatio of 2 would be assigned to the IO device D2, and a ReductionRatio of 4 to the IO device D3, giving a transmission cycle of 4 ms.
The transmission clock, which defines the minimum clock for the transmission of packets, can be set in the IO controller.
You can additionally set the transmission clock that defines the minimum clock for the transmission of packets.
The chosen controller transmission clock will generally correspond to the fastest update time assigned to a device.

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