...
- Communication line category: Serial, SerialOverUDP Device Redundant.
- Transmission parameters according to Quad 2000 (baud rate 300 up to 19200 Baud, 8 data bits, no parity, 1 stop bit).
Kotva | ||||
---|---|---|---|---|
|
...
- Communication protocol: MODBUS RTU Quad2000.
- Address is MODBUS address that is set in Quad 2000.
...
Configuration dialog box - tab "Protocol parameters".
They influence some optional parameters of protocol. You can define the following parameters:
Table 1
Key word | Full name | Description | Unit | Default value | ||||||
---|---|---|---|---|---|---|---|---|---|---|
| Retry Count | Number of retry calls when an error in communication occurs. | - | 2 | ||||||
| Retry Timeout | Delay between retry calls if an error in communication occurs. | ms | 100 millisec. | ||||||
| Wait First Timeout | First waiting on the response after sending a call. | ms | 100 millisec. | ||||||
| Wait Timeout | Delay between the readings of a response until it is completed. | ms | 100 millisec. | ||||||
| Max Wait Retry | Number of retry response reading until it is completed. | - | 20 |
String with protocol parameters is written according to this rule:
Key_word=value;Key_word=value; ...
Example:
WT=100;MWR=20;
If a key word with valid value has not been found in the initial string, default value is used according to Table 1.
Kotva | ||||
---|---|---|---|---|
|
...
I/O tags: Ai, Ao, Ci, Co, Di, Do
For relation between D2000 Value Type and Modbus Data Type Pre is applied this table:
Modbus Data Type | D2000 Value Type |
---|---|
Coil Status - 0x references | Do |
Input Status - 1x references | Di |
Input Registers - 3x references | Ai, Ci |
Holding Registers - 4x references | Ao, Co |
The address is Modbus register number in the range of 0 to 65535.
...