Data Types and Formats

Sepasoft MES Module Suite

This page is a reference to the various data types and formats that are used while scripting.

int

  • Int data type is a 32-bit signed two's complement integer

  • Minimum value is - 2,147,483,648 (-2^31)

  • Maximum value is 2,147,483,647(inclusive) (2^31 -1)

  • Integer is generally used as the default data type for integral values unless there is a concern about memory

  • The default value is 0

  • Example: int a = 100000, int b = -200000

long

  • Long data type is a 64-bit signed two's complement integer
  • Minimum value is -9,223,372,036,854,775,808(-2^63)
  • Maximum value is 9,223,372,036,854,775,807 (inclusive)(2^63 -1)
  • This type is used when a wider range than int is needed
  • Default value is 0L
  • Example: long a = 100000L, long b = -200000L

float

  • Float data type is a single-precision 32-bit IEEE 754 floating point

  • Float is mainly used to save memory in large arrays of floating point numbers

  • Default value is 0.0f

  • Float data type is never used for precise values such as currency

  • Example: float f1 = 234.5f

double

  • double data type is a double-precision 64-bit IEEE 754 floating point

  • This data type is generally used as the default data type for decimal values, generally the default choice

  • Double data type should never be used for precise values such as currency

  • Default value is 0.0d

  • Example: double d1 = 123.4

boolean

  • boolean data type represents one bit of information
  • There are only two possible values: true and false
  • This data type is used for simple flags that track true/false conditions
  • Default value is false
  • Example: boolean one = true

String

String types of literals can contain any Unicode characters

  •  Example: String a = "\u0001"

DateTime

See the Ignition documentation for various date functions: DateTime

List

The list can be written as comma-separated values (items) between square brackets. 

  • Items in a list need not be of the same type.
  • List indices start at 0, and lists can be sliced, concatenated and so on.
  • Example: 
            list l1 = ['Sarah', 'process segment', 100, 2018]
            list l2 = [1, 2, 3, 4, 5 ]
            list l3 = ["a", "b", "c", "d"]

Python Dictionary

In the following example the Date and Value pairs is passed as a Python dictionary:

values={dateTime1:4, dateTime2:3}


Code Snippet

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Code
#Define the from and to dates
date1 = system.date.getDate(2017, 2, 17)
dateTime1 = system.date.setTime(date1, 12, 55, 31)
date2 = system.date.getDate(2017, 2, 17)
dateTime2 = system.date.setTime(date2, 13, 06, 13)

equipmentPath = '[global]\Enterprise\San Marcos\MP Rotator\MP Rotator 1'
collectorType = 'Equipment State'
key = ''
values={dateTime1:4, dateTime2:3}

system.mes.addTagCollectorValues(equipmentPath, collectorType, key, values)

 


Sepasoft MES Module Suite