Communication line category: Serial.
The parameters of an 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 the real-time of the station can be enabled.
Station protocol parameters
You can set the following parameters:
Number of response retries if some error in communication occurs
|Keyword||Full name||Meaning||Unit||Default value|
|Maximum count of request retries. If no response returns after a request had been sent, the station's status will change to a communication error.||-||3|
|Max Wait Retry|
reading until it is completed
|The maximum number of retries of |
Delay between the response retry if some error in communication occurs
millisec.Delay readings until it is completed400 millisec.
|Timeout before resending a request if no response has been received.||ms||1000 |
First waiting for response
|Wait First Timeout|
|The delay after sending the request and before reading the response.||ms||500 millisec.|
A string containing the protocol parameters is being defined as follows:
If there is used a keyword with an invalid value is in the initialization string, there will be used the corresponding default value according the to table 1 will be used.
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:
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 - of TiA (or ToA) type, with address Type=FF, NrNumber=FFFF, RefReference=FF.
Message 0B ensures the real time reading of real-time and Message OC the writing of real-time writing.