Difference between revisions of "MC-Basic:IDNVALUE"
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? IDNVALUE (<drive_expression>, <idn_expression>, <element_expression>) | ? IDNVALUE (<drive_expression>, <idn_expression>, <element_expression>) | ||
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? IDNVALUE (<drive_expression>, <idn_expression>, <element_expression>, <ring_expression>) | ? IDNVALUE (<drive_expression>, <idn_expression>, <element_expression>, <ring_expression>) | ||
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? IDNVALUE (<drive_expression>, <idn_expression>, <element_expression>, , <connection_expression>) | ? IDNVALUE (<drive_expression>, <idn_expression>, <element_expression>, , <connection_expression>) | ||
--> Translator note: Ring number is zero | --> Translator note: Ring number is zero | ||
Revision as of 10:10, 3 November 2011
This function is used to read the value of a specified element of an IDN from a specified drive. It should be used when reading an IDN that takes numeric values.
Use the IDNSTATE query to read the execution state of a SERCOS procedure executing on the drive.
Short form
Ival
Syntax
IdnValue (<drive address>, <IDN>, <element>, {<ring>}, {<connection>} )
Availability
All versions {<ring>}, {<connection>}) options - from AMCS 0.4.7.12 for SERCOS III
Range
<drive address>: 1 to 254
<IDN>: 1 to 65536
<element>: 1 to 7
<ring>:1
<connection>:0 to 2 for normal systems (0 = chose automatically, 1 = first AT connection, 2 = first MDT connection)
Scope
Configuration, Task or Terminal
Limitations
Read-Only. Executed only in SERCOS communication phases 2, 3 and 4.
The IDN must be defined.
Examples
?IdnValue(1, 189, 7) ‘Get drive position following error
? IDNVALUE (<drive_expression>, <idn_expression>, <element_expression>)
? IDNVALUE (<drive_expression>, <idn_expression>, <element_expression>, <ring_expression>)
? IDNVALUE (<drive_expression>, <idn_expression>, <element_expression>, , <connection_expression>) --> Translator note: Ring number is zero
? IDNVALUE (<drive>, <idn>, <element>, <ring>, <connection>)