Configuration
4.9 Serial interface
CP 1243-8 IRC
Operating Instructions, 02/2018, C79000-G8976-C385-03
85
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The RTS/CTS delay (ms) can be required when a modem is connected via an RS-485
interface.
Default setting: 0. Permitted range: 0...65535
– Value 0
After setting the RTS signal, (turn transmitter on) transmission only starts when the
CTS signal (Clear To Send) was set by the modem.
– Value > 0
Transmission is not delayed until the CTS signal of the modem.
After the RTS signal has been set, transmission is delayed for the configured time and
then started immediately.
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The send delay time (ms) is used only when the clear to send (CTS signal) comes from
the modem (RTS/CTS delay time = 0).
As soon as the CTS signal comes from the modem, the send delay time is started.
Sending starts after the time has elapsed.
Default setting: 0. Permitted range: 0...65535
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Only for interfaces with the Network node type "Station" / "Node station".
The latest time (s) after which a CP expects to be polled. When this time has expired, the
CP sends a message to its local CPU indicating that the master station is disrupted.
Default setting: 0. Permitted range: 0...65535.
– Parameters configured:
After the configured time elapses, the CP sends a message to the local CPU.
– Parameter not configured at a transmission speed of 9600 bps:
After 4 seconds without frame traffic, the CP outputs a message.
– Parameter not configured at a transmission speed of 1200 bps:
After 32 seconds without frame traffic, the CP outputs a message.
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Max. allowed disruption time
Tolerance time (s) for a detected connection disruption.
If there is still a disruption on the connection when the set time has elapsed, the
disruption is signaled to all connection partners of the disrupted station.
Default setting: 0. Permitted range: 0...255. If 0 (zero) is set, the function is disabled.
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