1
Download PLC_2_Unity_Referenc..
Transcript
Data Types 8.10 Compatibility Between Data Types Compatibility Between Data Types Introduction The following is a presentation of the different rules of compatibility between types within each of the following families: z z z the Elementary Data Type (EDT) family the Derived Data Type (DDT) family the Generic Data Type (GDT) family The Elementary Data Type (EDT) Family The Elementary Data Type (EDT) family contains the following sub-families: z z z z z the binary format data type sub-family the BCD format data type sub-family the Real format data type sub-family the character string format data type sub-family the bit string format data type sub-family There is no compatibility whatsoever between two data types, even if they belong to the same sub-family. Derived Data Type (DDT) Family The Derived Data Type (DDT) family contains the following sub-families: z z 35006144 07/2011 the table type sub-family the structure type sub-family: z structures concerning input/output data (IODDT) z structures concerning other data 289
