UNIP communication protocol
Supported device types and versions
Communication line configuration
Communication station configuration
Station protocol parameters
I/O tag configuration
Literature
Changes and modification
Document revisions
Supported device types and versions
Communication supports reading and writing data by means of the UNIP protocol (© Ipesoft Žilina).
Communication line configuration
- Communication line category: Serial, SerialOverUDP Device Redundant.
- Asynchronous line parameters according to the variant and type of the device connection.
Communication station configuration
- Communication protocols: UNIP, UNIP Input Only, UNIP Time Synchro, UNIP Input Only Time Synchro, UNIP SCAN.
- The station address is a decimal number within the range 1...230, or a hexadecimal number with a hash at the beginning (e.g. #1A).
- The UNIP Time Synchro and UNIP Input Only Time Synchro protocols execute the real-time synchronization for stations (time is included in the request).
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.
Station protocol parameters
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 |
|---|---|---|---|
Retry Count | 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 |
Retry Timeout | Timeout before resending a request if no response has been received. | ms | 2000 ms |
Wait First Timeout | The delay after sending the request and before reading the response. | ms | 500 ms |
Wait Timeout | The delay between the response readings till its finalization. | ms | 500 ms |
Max Wait Retry | The maximum number of retries of the response reading. | - | 8 |
Wait ACK Timeout | First waiting for a response after writing, the ACK acknowledge is expected. | ms | 700 ms |
Wait First Get Stored | Waiting for a response after a request to read archive data. | s | 1 s |
AI Back Compatible | 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 |
Max. Activity Wait | 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 |
Use Daylight Saving Time in TS Req. | 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.
I/O tag configuration
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.
Literature
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Changes and modifications
- September 21st, 2000 – added UNIP SCAN protocol (for D2000 v4.50 and higher).
Document revisions
- Ver. 1.0 – February 9th, 2000
- Ver. 1.1 – September 21st, 2000
- Ver. 1.2 - September 18th, 2002 - the protocol parameter AIBC added.
- Ver. 1.3 - November 21st, 2010 - document updated.
Related pages:
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