L&G ProfiBus communication protocol

Supported device types and versions 
Communication line configuration
Communication station configuration
I/O tag configuration
Literature
Changes and modifications
Document revisions

Supported device types and versions

The protocol LGPROFIBUS implements communication with Landis&Gyr devices on the basis of the ProfiBus communication protocol.

This communication supports (is verified) these Landis&Gyr devices:

Table 1

Communication line configuration

The card KMFB02 (Incos a.s. Žilina) is used as a physical communication interface with the firmware by Ipesoft s.r.o. Žilina (stored in EPROM). The communication uses a baud rate of 93.75 kBd. Firmware in the card provides all basic tasks for access to the ProfiBus network. The card needs a KMFB02.SYS driver.

• Communication line category: PROFIBUS

• Line parameters (PROFIBUS tab):

  • Device ID – is ProfiBus Node Id, which is assigned to the KMFB02 card. It must be an unused number in the range of 0 up to 32 and reserved for the KMFB02 card in the ProfiBus network.

Communication station configuration

• Communication protocol: L&G Profibus

• The station address is ProfiBus Node Id of the device (PRU10) in the range of 0 up to 32.

Station protocol parameters

The parameters are configured in a dialog box – Communication station - configuration dialog box.

They influenced the behavior of the access to the communication medium. You can define the following parameters:

Table 2

The communication runs in the transaction way (Request/Response) for both data reading and writing. Data are read one point after another, always as a separate transaction.

A string containing the protocol parameters is being defined as follows:

Key_word=value;Key_word=value; ...

Example:

WT=90;RT=200;MTR=7;

If there is used a keyword with an invalid value in the initialization string, there will be used corresponding default value according to the table 1.

I/O tag configuration

I/O tags: Ai, Ao, Ci, Co, Di, Do, TiR, ToR, TxtI, TxtO

I/O tag types correspond to the following „Profibus_Type“:

Table 3