AVEVA™ Communication Drivers

General data types

Save PDF

General data types

Save PDF

Last UpdatedJul 29, 2024
2 minute read

General data types include all basic data types defined in the controller for general purpose usage. See Conversions and suffixes of items (symbolic addressing) for suffix definitions.

Note: Structural element names are predefined by the system and cannot be changed.

Data Format	Structural Element	Suffix	Data Type	Access	Value Range / Notes
Bool			VT_BOOL	Read/Write	FALSE or TRUE
Byte			VT_UI1	Read/Write	0 to 255
Char			VT_UI1	Read/Write	ASCII character set
DInt			VT_I4	Read/Write	-2147483648 to +2147483647
DWord			VT_UI4	Read/Write	0 to 4294967295
Int			VT_I2	Read/Write	-32768 to 32767
LInt			VT_I8	Read/Write	-9223372036854775808 to +9223372036854775807
LReal			VT_R8	Read/Write	-1.7976931348623158e+308 to -2.2250738585072014e-308 ±0,0 +2.2250738585072014e-308 to +1.7976931348623158e+308
LWord			VT_UI8	Read/Write	0 to 18446744073709551615
Real			VT_R4	Read/Write	-3.402823e+38 to -1.175495e-38 ±0,0 +1.175495e-38 to +3.402823e+38
SInt			VT_I1	Read/Write	-128 to 127
String			VT_BSTR	Read/Write	0 to 254 characters
UDInt			VT_UI4	Read/Write	0 to 4294967295
UInt			VT_UI2	Read/Write	0 to 65535
ULInt			VT_UI8	Read/Write	0 to 18446744073709551615
USInt			VT_UI1	Read/Write	0 to 255
WChar			VT_UI2	Read/Write	$0000 - $D7FF
WString			VT_BSTR	Read/Write	0 to 254 characters x. possible values: 0 to 16382
Word			VT_UI2	Read/Write	0 to 65535
Date			VT_UI2	Read/Write	0 to 65535 (days)
Date		D	VT_BSTR	Read only	1990-01-01 to 2168-12-31
Date_And_Time			VT_Date	Read/Write	1990-01-01-00:00:00.000 to 2089-12-31-23:59:59.999
Date_And_Time		DT	VT_BSTR	Read/Write	1990-01-01-00:00:00.000 to 2089-12-31-23:59:59.999 Note: DT suffix is required for SuiteLink.
LDT			VT_UI8	Read/Write	0 to 18446744073709551615 (nanoseconds)
LDT		LDT	VT_BSTR	Read/Write	1970-01-01-0:0:0.000000000 to 2263-04-11-23:47:16.854775808
LTime			VT_I8	Read/Write	-9223372036854775808 to +9223372036854775807 (nanoseconds)
LTime		LT	VT_BSTR	Read only	-106751d23h47m16s854ms775us808ns to 106751d23h47m16s854ms775us807ns
LTime_Of_Day			VT_UI8	Read/Write	0 to 18446744073709551615
S5Time			VT_I4	Read/Write	0 to 9990000 (milliseconds)
		S5T	VT_BSTR	Read only	10MS to 9S_990MS (Resolution: 0.01s)
					100MS to 1MIN_39S_900MS (Resolution: 0.1s)
					1S to 16MIN_ 39S (Resolution: 1s)
					0MS to 2H_46M_30S_0MS (Resolution: 10s <Default>)
Time			VT_I4	Read/Write	-2147483648 to +2147483647 (milliseconds)
Time		T	VT_BSTR	Read only	-24d20h31m23s648ms to +24d20h31m23s647ms
Time_Of_Day			VT_UI4	Read/Write	0 to 4294967295 (milliseconds)
Time_Of_Day		TOD	VT_BSTR	Read only	00:00:00.000 to 23:59:59.999
DTL <Structure>
UInt	.YEAR		VT_UI2	Read only	1970 to 2262
USInt	.MONTH		VT_UI1	Read only	1 to 12
USInt	.DAY		VT_UI1	Read only	1 to 31
USInt	.WEEKDAY		VT_UI1	Read only	1(Sunday) to 7(Saturday)
USInt	.HOUR		VT_UI1	Read only	0 to 23
USInt	.MINUTE		VT_UI1	Read only	0 to 59
USInt	.SECOND		VT_UI1	Read only	0 to 59
UDInt	.NANOSECOND		VT_UI4	Read only	0 to 999999999

AVEVA™ Communication Drivers

General data types

Table of Contents

General data types

Related Links