Siemens SIMATIC TeleControl DNP3 Configuration Manual page 45

● Send delay time (after CTS)
The delay time (ms) is used when readiness to send (CTS signal) is received from the
modem and when 0 (null) has been configured for the "RTS/CTS delay time".
– Value = 0
– Value > 0
Default setting: 0. Permitted range: 0...65535 ms
● RTS off delay
Only configurable with: TIM 1531 IRC
The RTS OFF delay (ms) defines when the module takes back the RTS signal after
sending.
– Value = 0
– Value > 0
Default setting: 0. Permitted range: 0...65535 ms
● Polling monitoring time
Only configurable with: TIM 3V-IE DNP3 / TIM 4R-IE DNP3
Only for interfaces with the Network node type "Station" / "Node station".
Time (s) after which the TIM expects to be polled. After this time elapses, the TIM sends
a message to its local CPU indicating that the master station is disrupted.
Default setting: 30. Permitted range: 0...65535 s
– Parameters configured:
– Parameter not configured at a transmission speed of 9600 bps:
– Parameter not configured at a transmission speed of 1200 bps:
Configuration - DNP3
Configuration Manual, 11/2018, C79000-G8976-C508-01
Transmission is not delayed until the CTS signal of the modem.
As soon as the CTS signal is received from the modem, the send delay time is started.
Sending starts after the time has elapsed.
The module takes the RTS signal back immediately after sending the last character.
Once the last character has been sent, the RTS OFF delay elapses before the module
takes back the RTS signal.
After the configured time elapses, the module sends a message to its local CPU.
After 4 seconds without frame traffic, the module outputs a message.
After 32 seconds without frame traffic, the module outputs a message.
Configuration
3.6 Serial interface
45