CAMSWITCH_REF
The data type CAMSWITCH_REF refers to a data structure with cam parameters for a digital cam controller MC_DigitalCamSwitch.
TYPE CAMSWITCH_REF :
STRUCT
NumberOfSwitches : UDINT;
pSwitches : POINTER TO MC_CamSwitch;
SizeOfSwitches : UDINT;
END_STRUCT
END_TYPE
Name | Type | Description |
|---|---|---|
NumberOfSwitches | UDINT | Number of array elements used. Can be less than the maximum number. |
pSwitches | POINTER TO MC_CamSwitch | Pointer to the digital cam array. |
SizeOfSwitches | UDINT | Maximum size of the digital cam array. |
The actual data structure for parameterization of a digital cam controller is usually an ARRAY OF MC_CamSwitch. CAMSWITCH_REF refers to this structure via a pointer and clearly defines the size of the structure and the number of actual cams.
A variable of type CAMSWITCH_REF is initialized as illustrated in the following example:
VAR
CamSwitchArray : ARRAY[1..3] OF MC_CamSwitch;
CamSwitchRef : CAMSWITCH_REF;
END_VAR
(* real number of defined digital cams *)
CamSwitchRef.NumberOfSwitches := 1; (* 1..3 *)
(* pointer to the digital cam data array *)
CamSwitchRef.pSwitches := ADR(CamSwitchArray);
(* maximum size of the digital cam data array *)
CamSwitchRef.SizeOfSwitches := SIZEOF(CamSwitchArray);
Example with two cam tracks
