Supported device types and versions
Communication line configuration
Communication station configuration
I/O tag configuration
Literature
Changes and modifications
Document revisions
This protocol supports data reading and writing to DIRAS devices produced by Paufex s.r.o. Prešov.
Communication line category: Serial.
The parameters of asynchronous line are set according to version and type of device
connection.
Communication protocol: Paufex DIRAS.
The station address is a decimal number in the range 0 up to 127.
If necessary, the synchronization of real time of station can be enabled.
You can set the following parameters:
Table 1
| Key word | Full name | Meaning | Unit | Default value |
|---|---|---|---|---|
| Retry Count | Number of response retries if some error in communication occurs. | - | 3 | |
| Max Wait Retry | Maximum retries of reading the response until it is completed. | - | 8 | |
| Retry Timeout | Delay between the response retry if some error in communication occurs. | ms | 1000 millisec. | |
| Wait Timeout | Delay between readings the response until it is completed. | ms | 400 millisec. | |
| Wait First Timeout | First waiting for response after sending the request. | ms | 500 millisec. |
String containing the protocol parameters is being defined as follows:
Key_word=value;Key_word=value; ...
Example:
RC=1;RT=500;
If there is used a keyword with an invalid value in the initialization string, there will be used corresponding default value according the table 1.
I/O tags: Ai, Ao, Ci, Co, Di, Do, TiA, ToA, TiR, ToR.
The address requires three parameters: type, number and reference.
The values are set in hexadecimal format:
Data reading is done in the individual references by the message 02. Message 03 is used to write a new value to the reference.
A real time may be read / written also with the I/O tag - TiA (or ToA) with address Type=FF,Nr=FFFF,Ref=FF. Message 0B ensures the real time reading real time and Message OC the real time writing.
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