Communication Protocols

Introduction

This topic describes the characteristics of the supported RTU protocols.

Functions and Protocols

The BMXNOR0200H module supports these functions and protocols:

RTU protocols	IEC 60870-5-101 (master or slave)
	IEC 60870-5-104 (client or server)
	DNP3 serial (master or slave)
	DNP3 NET (client or server)
Main RTU protocol features	time synchronization through a protocol facility or NTP
	balanced and unbalanced transmission mode
	events management with time stamping
	events queue stored in RAM memory (up to 100,000 events for all clients)
	events data backfill to SCADA application via protocol facility
	report by exception data exchanges
	unsolicited messaging data exchanges
	protocol setup via webpage

NOTE: The RTU protocol parameters are configured using the embedded webpages.

Limitations

The BMXNOR0200H module does not support multiple RTU protocols instances. Only one instance at a time of an RTU protocol (IEC, DNP3) can be launched to work with Modbus TCP.

NOTICE

UNINTENDED EQUIPMENT OPERATION

Use different address values for each session in a channel or for each section in a session.
Channel parameters must meet IEC60870-5-104 protocol requirements with these limitations: T2 S Frame Period < T1 Ack Period and W Value < 2/3 K Value.
If you are using the DNP3 protocol, use successive DB mapping starting at 0.

Failure to follow these instructions can result in equipment damage.