Phoenix Contact RAD-900-DAIO6, User Manual, Page: 89 / 140

Serial data mode (RAD-900-IFS only)
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6.1 Frame-based data transmission
T
IdleMin
parameter (minimum pause between two frames)
The T
IdleMin
parameter refers to the minimum pause that must elapse between two frames
on the output side (wireless module is transmitting data via serial interface).
Figure 6-4 Frame-based data transmission: T
IdleMin
parameter
T
FrameEnd
parameter
T
FrameEnd
is the time which is kept by the transmitting wireless module between two frames.
If the data received by the wireless module is followed by a certain period of time where no
further data is received, the wireless module assumes that the frame has arrived in its
entirety. The frame is then transmitted. This period of time is referred to as T
FrameEnd
.
T
FrameEnd
must be shorter than the minimum interval between two frames
(T
FrameEnd
< T
IdleMin
). T
FrameEnd
must, however, also be greater than the maximum interval
that is permitted between two characters in a frame. Otherwise the frame might be
fragmented.
Figure 6-5 Frame-based data transmission: T
FrameEnd
parameter
Fr a me 1
T
id l eMin
Id l e Id l e Id l e
Fr a me 2
T
id l eMin
Fr a me 3
T
id l eMin
Fr a me 1
O K
Fr a me 2
NOT O K
T
Fr a meEnd
T
Fr a meEnd
Id l e Id l e Id l e