Supported device types and versions
Communication line configuration
Communication station configuration
Station protocol parameters
I/O tag configuration
Literature
Changes and modification
Document revisions
Communication supports reading and writing data by means of the UNIP protocol (© Ipesoft Žilina).
Note:
The UNIP SCAN protocol is a passive protocol that tracks the active communication of another UNIP master/slaves system. It doesn't send polls but decodes the tracked communication.
Communication station - configuration dialog box - Protocol parameters tab.
They influence some optional protocol parameters. The following station protocol parameters can be defined:
Table 1
| Parameter | 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 | |
| Timeout before resending a request if no response has been received. | ms | 2000 ms | |
| The delay after sending the request and before reading the response. | ms | 500 ms | |
| The delay between the response readings till its finalization. | ms | 500 ms | |
| The maximum number of retries of the response reading. | - | 8 | |
| First waiting for a response after writing, the ACK acknowledge is expected. | ms | 700 ms | |
| Waiting for a response after a request to read archive data. | s | 1 s | |
| In D2000 V5.00.017 Rel.A020430541, the interpretation of I/O tags of the AI and AO types of the forms of 3, 5, 6, and 7 has been modified to signed ones. The value of AIBC=YES enables backward compatibility and these I/O tags will be interpreted as unsigned. | - | NO | |
| For the UNIP SCAN protocol only – time (in seconds) within which the response for a given station must be received, otherwise the station passes to a communication error. | s | 600 s | |
| Setting the parameter to YES activates the use of daylight saving time in the timestamped requests. | - | NO |
A string containing the protocol parameters is being defined as follows:
Keyword=value;Keyword=value; ...
Example:
RC=1;RT=500;
If a keyword with an invalid value in the initialization string is used, a corresponding default value according to table 1 will be used.
Possible I/O tag types:
Ai, Ci, Di for the UNIP Input Only and UNIP Input Only Time Synchro protocols.
Ai, Ao, Ci, Co, Di, Dout for the UNIP, UNIP Time Synchro, and UNIP SCAN protocols.
Address: Decimal number within the range of 0...255.
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