Appendix A: Data Types - Parker 2003-IP-00 Technical Manual

APPENDIX A: Data types

The relationship between AC20 parameter and Ethernet IP data type is given in the table below.
AC20 Parameter
Data Type
BOOL
SINT
INT
DINT
USINT
UINT
UDINT
REAL
TIME
DATE
TIME_OF_DAY
DATE_AND_TIME
STRING
BYTE
WORD
DWORD
** 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
0145
0146
0147
...
0157
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.
DOC-0017-08-EN: AC20 Series Ethernet/IP Option
Description
Boolean
Short integer
Integer
Double integer
Unsigned short integer
Unsigned integer
Unsigned double integer
Floating point
Duration
Date
Time of day
Date and time of day
String
Bit string length 8
Bit string length 16
Bit string length 32
Parameter - VHZ_USER FREQ
whole array
index 0
index 1
...
index 10
DOC-0017-08-EN-B 04.04.2023
CIP
Data Type
BOOL
SINT
INT
DINT
USINT
UINT
UDINT
FLOAT
UDINT
UDINT
UDINT
UDINT
SHORT_STRING**
USINT
UINT
UDINT
Bytes
1
1
2
4
1
2
4
4
4
4
4
4
n
1
2
4
39 (46)