Configuration
4.10 Serial interface > Advanced options
TIM 1531 IRC
Operating Instructions, 02/2018, C79000-G8976-C468-02
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4.10.3
Dialup network
Settings dialup network
Only the configurable parameters are explained.
Settings serial interface
●
Interface standard
Standard of the serial interface: RS232 / RS485 - can be switched over
Select one of the following values:
–
RS232
When a modem is connected to the interface of the TIM
–
RS485
Connection of the internal terminating resistor of the TIM
With parallel connection of several modems to the interface of the TIM (star-shaped
network)
●
RS-485 termination
Enable the option when connecting a terminating resistor for the RS-485 bus when a star-
shaped network is connected.
Number of spontaneous frames
●
Number of spontaneous frames
Only for interfaces with the Network node type "Station" / "Node station".
The parameter decides after how many messages the master station has the opportunity
of transferring its pending messages 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.
●
Limit for locked frames
Only for interfaces with the Network node type "Station" / "Node station".
Messages 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 messages in the send buffer. If
the value is exceeded, the image procedure is used for new messages 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.
