Parameters depending on the protocol type determine the communication protocol behaviour during communication with station. Parameters are entered into the input Protocol parameters edit field in the form:
PRM1=value;PRM2=value
etc.
PRM1, PRM2
- names of parameters
In the following table the most commonly used protocol parameters are described together with the explanation of function, which are used mainly for asynchronous protocols of Request/Response type. Particular types of supported parameters for individual protocols can be found in documentations of protocols.
parameter | name | meaning |
---|---|---|
RC | Retry Count | Maximum number of request's repeats, until the communication protocol gets the requested response to the request. |
RT | Retry Time [ms] | Time (in milliseconds) of request delay if the previous response is evaluated as invalid. |
WFT | Wait First Time [ms] | The first delay of response reading after request transmission is finished. |
WT | Wait Time [ms] | Delay between another data readings from the communication line before the response is completed. |
MWR | Max Wait Retry | Maximum number of response reading repeats from the communication line before the response is completed. Between readings there is WT delay. |
A | Request is repeated at most RC times. |
B | The first WFT delay after massage transmission. |
C | The next WT delays are repeated at most MWR times. |
D | If the response is not valid, there is RT delay and the request is repeated. |
Communication station |