oCounter2L Object

The oCounter2L Object monitors the inputs to the two I/O lines specified by the IOLine1 and IOLine2 properties and will increment or decrement the Position property as the two inputs change. 

The oCounter2L Object evaluates the two inputs as follows: The first Input line is used as a clock while the second I/O line is used as a direction input.  This results in a single count for each time the first input changes.  The direction of this count is determined by the state of the second input. If the second input is the same as the first, then the Count property is incremented.  If the second input is different than the first, then the Count property is decremented.  Each time the count changes, the Direction property is updated with the direction of the change and the Moved property is set.

The following table lists the properties of the oCounter2L Object:

Property	Description
Count	A value that indicates how many pulse have been counted. Object Class:  oWord   Value Range:  0 - 65535 Data Type:  Numeric   Default Value:  0 A value that indicates the position of the quadrant encoder. If the second input is the same as the first, then the Count property is incremented.  If the If the second input is different than the first, then the Count property is decremented
Direction	A value that indicates the direction of the last count. Object Class:  oLogic   Value Range:  0 - 1 Data Type:  Numeric   Default Value:  0 A value that indicates the direction of the last movement.  This value is updated each time the Count property is changed.  Value Description 0 The last change to the Count property was an increment. 1 The last change to the Count property was a decrement.
Changed	A value that indicates that the count has Changed. Valid for 1 link list loop. Object Class:  oLogic   Value Range:  0 - 1 Data Type:  Numeric   Default Value:  0 This value is updated each time Count property changes at which time it is set to cvTrue. In firmware B.x this value is valid for one link list loop. In firmware C.x this value is User-Cleared.
IOLine1	A value that specifies which I/O Line is used for the first input. Object Class:  oIOLine   Value Range:  0 - 31 Data Type:  Numeric   Default Value:  0 Some I/O Lines have special purposes.  Be sure to see oIOLine help file for details.
IOLine2	A value that specifies which I/O Line is used for the second input. Object Class:  oIOLine   Value Range:  0 - 31 Data Type:  Numeric   Default Value:  0 Some I/O Lines have special purposes.  Be sure to see oIOLine help file for details.
InvertD	A value that selects if the count direction of the Count property and the Direction property will be reversed. Object Class:  oSelect0to1   Value Range:  0 - 1 Data Type:  Numeric   Default Value:  0 Value Description 0 The Count property is incremented when the first input changes to the same state as the second input. 1 The Count property is decremented when the first input changes to a different state as the second input.
Operate	A value that selects whether or not the cycles on the inputs are read. Object Class:  oOperate   Value Range:  0 - 1 Data Type:  Numeric   Default Value:  0 Operate Constant Description 0 cvOff The counter does not count the cycles on the input. 1 cvOn The counter counts the cycles on the input.
Address	Returns a pointer to the address of the oCounter Object instance. Object Class:  oAddress   Value Range:  0 - 127 Data Type: Pointer (Read Only)   Default Value:  Address of Object

'This program reads an oCounter2L Object 'and outputs the value on I/O lines 8 - 15. Dim A As New oCounter2L Dim B As New oDIO8 Sub Main() ooPIC.PullUp = 1 A.IOLine1 = 8 A.IOLine2 = 10 A.Operate = cvTrue B.IOGroup = 3 B.Direction = cvOutput Do B=A Loop End Sub

B.1.0: Introduced.
B.2.0: InvertD property added.
C.1.0: Moved property changed to User-Cleared.

Bugs: No known bugs.