KEB COMBIVERT G6, Руководство по программированию

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IO-Link Interface
3.3 Frame types
The IO-Link specification defines different telegram types, which differ by the size of the
process input and process output data.
For the buildup of the communication, the master must determine the communication
parameters of the device. One of the relevant informations is the length of the process
data. Based on this information, the IO-Link master decides which type of telegram for
cyclic data exchange is used.In the phase of the communication setup the master uses
the telegram type 0.
For the cyclic communication the G6 supports the frame type 1 in the "interleaved
mode":
Process data cycle n
Process data cycle n+1
t (time)
Frame sequence type „Interleave“
Cycle time
CMD
CHK/TYPE
PI x
PI x
PI x+1
PI x+1
PI x+2 PI x+3
PI x+y-1 PI x+y
ON-REQ ON-REQ
ON-REQ ON-REQ
ON-REQ ON-REQ
ON-REQ ON-REQ
CHK/TYPE
CHK/TYPE
CHK/TYPE
CHK/TYPE
CHK/TYPE
CHK/TYPE
CHK/TYPE
CMD
CMD
CMD
CMD
CMD
CMD
CMD
Figure 1: Interleaved mode
By that it also sent on-request data between the process data. If they are not needed,
dummy commands are transmitted. Thus, a fixed process data cycle time is realized. At
first the PD-out data are transmitted, after that the PD-in data.