Transmission Settings - Dnp3 - Siemens CP 1243-1 Operating Instructions Manual

The value configured in TCSB is transferred by the telecontrol server to the CP the first
time the connection is established.
Each time the CP transfers data to TCSB and receives the acknowledgment from the
telecontrol server, the CP starts the watchdog cycle. When the watchdog cycle has
expired the CP sends a watchdog frame to the telecontrol server.
After sending a watchdog frame, the CP starts the watchdog monitoring time within which
the CP expects a reply from the telecontrol server. If the CP does not receive a reply from
the Telecontrol server within the monitoring time, it terminates and re-establishes the
connection.
Default setting: 30 s. Permitted range: 0...65535 s. If you enter 0 (zero), the function is
disabled.
● Key exchange interval
Here, you enter the interval in hours after which the key is exchanged again between the
CP and the telecontrol server. The key is a security function of the telecontrol protocol
used by the CP and TCSB V3.
Default setting: 8 s. Permitted range: 0...65535 s. If you enter 0 (zero), the function is
disabled.
4.6.5 Transmission settings – DNP3
Transmission settings – DNP3
● Disturbance bit
The disturbance bit can be used as bit 1.6 (IIN1.6) of the "Internal Indication Bytes" to
indicate to the master when the CPU is in STOP mode.
● Max. time between Select and Operate
Max. duration (seconds) between Select and Operate. For a Select command to be
transferred to the CPU and to take effect, no other frame may be sent to the station
between Select and Operate.
Permitted range: 1..65535
Default setting: 1
● Frame repetitions
Number of frame repetitions at the Data Link Layer if no acknowledgement is received
from the master.
Permitted range: 0 ... 255
Default setting: 0
If you enter 0 (zero), the function is disabled.
● Connection confirmation
Condition for the CP to request a connection confirmation from the master (never,
always, only with segmented frames).
CP 1243-1
Operating Instructions, 04/2017, C79000-G8976-C365-03
Configuration
4.6 Ethernet interface
49