Configuration
4.9 Serial interface
CP 1243-8 IRC
86 Operating Instructions, 02/2018, C79000-G8976-C385-03
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Ratio "Polling / Spontaneous"
Max. number of spontaneous frames that can be sent by a master station between two
polls.
Only for interfaces with the Network node type "Master station".
Default setting: 0. Permitted range: 0...255. If 0 (zero) is set, the function is disabled.
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Specifies the form in which data frames are sent.
– As single frames
– Several frames as a block
Dialup network
Settings dialup network
Only the configurable parameters are explained.
Settings serial interface
Number of spontaneous frames
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Number of spontaneous frames
Only for interfaces with the Network node type "Station" / "Node station".
The parameter decides after how many frames the master station has the opportunity of
transferring its pending frames to the station. As maximum, the configured number of
spontaneous frames that are pending at the time of the first call frame are transferred.
Default setting: 200. Permitted range: 0...255
If 0 (zero) is set, all spontaneous frames are sent at the call.
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Only for interfaces with the Network node type "Station" / "Node station".
Frames are marked as locked when due to communications problems they cannot be
transferred to the communications partner.
The parameter specifies the maximum quota of locked frames in the send buffer. If the
value is exceeded, the image procedure is used for new frames to prevent the send
buffer from overflowing.
Default setting: 50. Permitted range: 0...90
If 0 (zero) is set, all spontaneous frames are sent at the call.
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