MC_CamTblSelect

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 Function Block - Defined to read and initialize the specified profile.
Selects the Cam tables by setting the pointers to the relevant tables.

Inputs

Input

Data Type

Range

Unit

Default

Description

Execute

BOOL

FALSE, TRUE

N/A

No default

On the rising edge, request to initialize the CAM profile.

CamTable

STRING

No range

N/A

No default

Profile name as defined in the CAM Profile Properties dialog.

Periodic

BOOL

FALSE, TRUE

N/A

No default
  • If TRUE, makes the profile is periodic.
  • See Usage.

MasterAbsolute

BOOL

FALSE, TRUE

N/A

No default
  • If TRUE, use Absolute Master position.
  • If FALSE, use Relative Master position.
  • See Usage.

SlaveAbsolute

BOOL

FALSE, TRUE

N/A

No default
  • If TRUE, use Absolute Slave position.
  • If FALSE, use Relative Slave position.
  • See Usage.

Outputs

Output

Data Type

Range

Unit

Description

Done

BOOL

FALSE, TRUE

N/A

Indicates whether this function block has completed without error.

Busy

BOOL

FALSE, TRUE

N/A

Indicates this function block is executing.

Error

BOOL

FALSE, TRUE

N/A

Indicates an invalid input was specified.

ErrorID

INT

No range

N/A

Indicates the error if the Error output is high.

See PLCopen Function Block ErrorIDs.

CamTableID

INT

0 to 255

N/A

CAM table identifier used with other CAM function blocks.

Remarks

Usage

  • Each positive transition of the Enable input creates a unique Cam ID and store the profile information in a table.
    • The number of unique Cam IDs is limited to 256.
    • If the application attempts to create more than 256 Cam IDs:
      • The Error output is TRUE.
      • The ErrorID output is 22 (Too Many Profiles).
    • It is only necessary to call MC_CamTblSelect once for each Profile/Periodic/MasterAbsolute/SlaveAbsolute configuration to be used.
  • The Periodic input specifies if the profile is to repeat each cycle.
    • If the profile is not periodic and the master axis moves beyond the profile range, the slave stops at the end of the profile.
  • If the master axis moves back into the profile range, the slave resumes following the profile.
  • If the MasterAbsolute input is ON, the profile is in reference to the Master axis position.
    • If the MasterAbsolute input is OFF, the profile is in reference to the Master axis position at the time the MC_CamIn function block is executed.
  • The SlaveAbsolute input specifies if the slave positions are in reference to the Slave axis position or the Slave axis position at the time the MC_CamIn function block is executed.
    • If the SlaveAbsolute input is set to TRUE, the axis jumps back to the starting position.
    • If the SlaveAbsolute input is set to FALSE, the axis no longer jumps back.
      • Instead, as the profile repeats, the slave moves relative to the start of each period.

FBD Language Example

Not available.

FFLD Language Example

IL Language Example

Not available.

ST Language Example

(* MC_CamTblSelect ST example *) //call this function block every scan until "Done"
Inst_MC_CamTblSelect(DoSelect, 'Profileb', TRUE, TRUE, TRUE ); //Inst_MC_CamTblSelect is instance of MC_CamTblSelect
CamSelDone := Inst_MC_CamTblSelect.Done;  //store Done output to user defined variable
IF CamSelDone = TRUE THEN//when function block is "done" store
CamTableID := Inst_MC_CamTblSelect.CamTableID;  //CamTableID in user defined variable
END_IF;

See Also