Interfaces; General; Automatic Protocol Recognition - Baer DLX User Manual

8

Interfaces

8.1

General

Three interfaces are available in the DLX unit:
•
Service interface for programming purposes and data retrieval
•
Data interface "Com1" for data retrieval on site (optional)
•
Modem interface "Com2" for remote data retrieval (optional); device can
also be equipped with a second data interface "Com2" instead of the mo-
dem.
8.1.1

Automatic protocol recognition

The DLX unit automatically recognizes the retrieval protocol (currently
SCTM, IEC60870-5-102 or the programming software DLXPARA). On both
direct interfaces (service interface and data interface/Com1) the first query
telegram will be lost in the case of a protocol change (the modem interface
can change the protocol without losing a telegram). Therefore DLXPARA
can be used to define the default protocol for the data interface (the default
protocol for the service interface is always the IE60870-5-102 protocol).
The DLX unit will switch to the default protocol after each programming ac-
tivity and after 5 minutes with no communication on the relevant interface.
Starting from version 1.05.00 it is possible to activate the protocol Modbus
RTU (instead of SCTM / IEC 60870-5-102 for the interfaces Com1 and
Com2 only).
Due to safety reasons the programming software can only communi-
cate with the service interface.
Remote parametering is not possible!
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