232 Rockwell Automation Publication 1766-UM001I-EN-P - June 2015
Appendix F MicroLogix 1400 Distributed Network Protocol (DNP3)
RTS Send Delay (x20 ms)
When the Control is set at Half Duplex Modem(CTS/RTS handshaking), this
entry is enabled. This specifies a time delay between the raising of the RTS and
the initiation of a transmission.
The valid range is 0…65535. Default value is 0.
Max Random Delay (x1 ms)
This parameter is used with Pre Transmit Delay (x1 ms) for Collision Avoidance
on RS-485 network. For more details, see Collision Avoidance on page 310.
The valid range is 0…65535. Default value is 0.
Channel 1(Ethernet) Link Layer Configuration Parameters
This section is only applicable to MicroLogix 1400 Series B controllers.
The DNP3 over IP subsystem in the MicroLogix 1400 supports Listening End
Point, TCP Dual End Point and Datagram End Point type.
Listening End Point type supports a single TCP connection as a Server and UDP
datagram.
TCP Dual End Point type supports a single TCP connection as a Server, a single
TCP connection as a Client and UDP datagram.
Datagram End Point type supports UDP datagram from DNP3 Masters. The
default TCP and UDP port numbers are 20000 and the port numbers are
configurable.
The End Point type can be determined by the parameter End Point Type.
According to the parameter, the MicroLogix 1400 works as different End Point
types. See the following table for each configuration.
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