Supported device types and versions
This protocol supports data reading and writing to DIRAS devices produced by Paufex s.r.o. Prešov.
Communication line configuration
Communication line category: Serial.
The parameters of asynchronous line are set according to version and type of device connection.
Communication station configuration
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.
Station protocol parameters
You can set the following parameters:
|Key word||Full name||Meaning||Unit||Default value|
|RC||Retry Count||Number of response retries if some error in communication occurs.||-||3|
|MWR||Max Wait Retry||Maximum retries of reading the response until it is completed.||-||8|
|RT||Retry Timeout||Delay between the response retry if some error in communication occurs.||ms||1000 millisec.|
|WT||Wait Timeout||Delay between readings the response until it is completed.||ms||400 millisec.|
|WFT||Wait First Timeout||First waiting for response after sending the request.||ms||500 millisec.|
String containing the protocol parameters is being defined as follows:
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 tag configuration
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:
- Type – 0 up to FF
- Number (Nr) – 0 up to FFFF
- Reference (Ref) – 0 up to FF
Data reading and writing
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.
Changes and modifications
- 21.1.2000 – Testing the communication
- Ver. 1.1 – February 8, 2000 – Updating