Supported device types and versions
Communication line configuration
Communication station configuration
I/O tag configuration
Literature
Changes and modifications
Document revisions
MODBUS RTU MASTER supports data reading from the Circutor CVMk analyzers.
There can be defined the following parameters:
Table 1
| Keyword | Full name | Meaning | Unit | Default value |
|---|---|---|---|---|
| Retry Count | The number of request retries when an error in communication occurs. | - | 2 | |
| Retry Timeout | Delay between request retries if an error in communication occurs. | ms | 200 millisec. | |
| Wait First Timeout | First waiting for the response after sending a request. | ms | 100 millisec. | |
| Wait Timeout | Delay between the readings of a response until it is completed. | ms | 100 millisec. | |
| Max Wait Retry | The number of response reading retries until the response is completed. | - | 15 |
String with protocol parameters is written according to this rule:
Key_word=value;Key_word=value;...
Example:
RC=1;RT=500;
If a keyword with a valid value has not been found in the initial string, the default value is used according to Table 1.
I/O tags: Ai
Address – a number in the range of 0 to 65535 – number of MODBUS double register. It can be specified as a decimal number or a hexadecimal number with a hash at the beginning (e.g. #0ABC).
The values are read by 2 registers and interpreted as a 4-byte integer. The addresses of values are described in the literature about Circutor.
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