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DOC-0017-10-EN: AC20 Series PROFINET IO Option
40 (47) DOC-0017-10-EN-B 04.04.2023
APPENDIX A: Data types
The relationship between AC20 parameter and PROFINET data type is given in the table below.
AC20 Parameter CIP
Data Type Description Data Type Bytes
BOOL Boolean BOOL 1
SINT Short integer SINT 1
INT Integer INT 2
DINT Double integer DINT 4
USINT Unsigned short integer USINT 1
UINT Unsigned integer UINT 2
UDINT Unsigned double integer UDINT 4
REAL Floating point FLOAT 4
TIME Duration UDINT 4
DATE Date UDINT 4
TIME_OF_DAY Time of day UDINT 4
DATE_AND_TIME Date and time of day UDINT 4
STRING String SHORT_STRING** n
BYTE Bit string length 8 USINT 1
WORD Bit string length 16 UINT 2
DWORD Bit string length 32 UDINT 4
** SHORT_STRING consists of a single-byte length field followed by the actual character data.
Arrays
Some parameters have multiple elements and are classified as parameter arrays. A parameter array has a
parameter number that accesses the
whole
of the array. It also has parameter numbers that represent
each
element
of the array.
Array Example: A parameter array called
VHZ_USER FREQ has 11 elements.
Parameter Number Parameter - VHZ_USER FREQ
0145 whole array
0146 index 0
0147 index 1
… …
0157 index 10
If the parameter number of the whole array is 0145, then the parameter number of the element index 0 of
the array will be 0134, the parameter number of the element index 01 will be 0147, etc.
String
A string parameter may be accessed via its parameter number. This is in the format of a SHORT_STRING.
String arrays may not be accessed as a whole array but may be accessed via each element. Each element
has its own parameter number.