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 station configuration

  • Communication protocols: UNIP, UNIP Input Only, UNIP Time Synchro, UNIP Input Only Time Synchro, UNIP SCAN.
  • Station address is a decadis number within the range 1...230.
  • The UNIP Time Synchro and UNIP Input Only Time Synchro protocols execute the real time synchronisation for stations (time is included in poll).

Note:
The UNIP SCAN protocol is a passive protocol that tracks active communication of other UNIP master/slaves system. It doesn't send polls, but decode the tracking 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 Poll repetition count in case of a communication error. - 3
Retry Timeout Delay between poll repetition in case of a communication error. ms 2000 ms
Wait First Timeout First waiting for response after sending the poll. ms 500 ms
Wait Timeout Delay between response readings till its finalization. ms 500 ms
Max Wait Retry Repetition count of response readings till its finalization. - 8
Wait ACK Timeout First waiting for 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 given station must be received, otherwise the station passes to 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

String containing the protocol parameters is being defined as follows:

Keyword=value;Keyword=value; ...

Example:

RC=1;RT=500;

If there is used a keyword with an invalid value in the initialization string, there will be used corresponding default value according the table 1.

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:

Communication protocols

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