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The KNR fields are used for connection point numbers. The number of connection points is determined by the selected function code, and can be any number between 1 and 12.

 

Please note that cadett ELSA supports an unlimited number of connection points per I/O, but the lack on the market of PLC's with more than 11 connection points per I/O, makes higher numbers less useful.

 

The sequence of the connection point numbers for each I/O is significant for mirror booking. Therefore, please make sure to define them in a consistent manner.

 

The two figures below shows how connection point numbers for a typical digital output, and a typical analogue input, can be defined.

 

 

 

 

Technical detail

 

KNR1, KNR2, KNR3, and so on, are the attribute names used in I/O symbols for connection point numbers. KNR is in fact an abbreviation for the German word "Kontaktnummer", which means "Contact number".