Ascii Protocol; Multidrop Protocol - IFM Electronic efector 190 Data Matrix Notice Pour Utilisateurs

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ASCII protocol

The ASCII protocol is a very simple and therefore easy-to-implement protocol.

For the output of the reading result first of all the parameterised start character string,

then the reading result, as an option a character for the code quality and finally the

parameterised stop character string are transmitted. Once the triggering has been

Configure trigger

activated via the process interface (dialogue window

, page 46), the

sensor will trigger a reading process on receipt of the character "t" or "T" (ASCII

codes 116

and 84

The ASCII protocol also allows selection of another configuration data file via the

process interface. The characters "p" or "P" (ASCII codes 112

and 80

) followed by

two numbers (ASCII code 48

up to 57

) have to be transmitted to the sensor. The

two numbers indicate the number of the selected configuration data file. For exam-

ple, the character sequence "p03" selects the third configuration data file from the

Manage configuration data

list in the

dialogue page which is used for subsequent

readings.

The trial to select a non-existing configuration data file is ignored by the reader.

The multidrop protocol allows interfacing of several sensors with a master via an RS-

485 bus. An example for interfacing three sensors with one master is shown in the

following figure. In such a network a master can communicate with each sensor indi-

vidually via different commands.

Table des Matières

Table des Matières