Types of Communication Entities

At a Glance

There are different types of communication entities. To characterize them, the following keywords have been created: SYS, APP, and APP.num. Another keyword, ALL, makes it possible to send general broadcast messages.

These exchanges are performed by the communication functions described in the Communication EF library.

It is possible to class addresses into three types:

local addresses
remote addresses
broadcast addresses

Keywords

The keywords are as follows:

SYS gives access to the Uni-te server of a processor, channel, communication module, etc.
APP gives access to a station’s PL7 or Control Expert application.
ALL is defined to describe a broadcast. For a TSX SCY 11601 module, the keyword is 0. It may replace one of the elements of a topological address. The broadcast level is determined according to the location of the keywords ALL or 0 in the address:
- when alongside the network number, the broadcast is sent to all stations on the selected network (e.g.: the address ADDR('{2.ALL}') represents all stations on network 2),
- when alongside the station number, the broadcast is sent to all the entities connected to the intra-station communication channels (e.g.: the address ADDR('{2.4}ALL') represents all the communication entities of station 4 on network 2).

NOTE: For the sender application to communicate with the text function block of a TSX series 7 PLC’s PL7-2 or PL7-3 application, the keyword must be APP.num, where num corresponds to the destination text function block number for the exchange.

Local Addresses

Local addresses contain topological addresses and the addresses of slaves on a bus.

Destination	Local address
Micro/Premium Uni-TE server	SYS
PL7 or Control Expert application	APP
PL7-3 application	APP.text block number
Uni-Telway slave	module.channel.slave number
Modbus slave	module.channel.slave number
Link in character mode	module.channel.SYS
Module server	module.SYS
Sub-module or channel server	module.channel.SYS
Fipio device server	\bus number.connection point\SYS

Remote Addresses

Remote addresses correspond to the addresses of devices connected to a network.

Destination	Remote address
Destination on remote network	{network.station}local address
Destination on local network	{station}local address

Broadcast Addresses

Broadcast addresses depend on the destination devices.

Destination	Broadcast address
Broadcast to all stations	{network.ALL}local address
Broadcast to all local addresses	{network.station}ALL
Broadcast to all modules	ALL.SYS
Broadcast to all Uni-Telway or Modbus slaves	module.channel.ALL
Broadcast to all Modbus slaves with a TSX SCY 11601 module	module.channel.0

NOTE: For Modbus equipments the report code of Broadcast function for a correct operation is 1.