MC_CamInfo

The MC_CamInfo function block is used to determine data on the current state and the current parameterization of a cam plate coupling. The command assumes that the slave axis is coupled by a cam plate. If the AtMasterPosition input is TRUE, not the current state but the state related to the specified master position is determined. The data obtained is placed into the CamInfo data structure.

	If the coupled axis group gets into an error situation (e.g. emergency stop), the function block will return the most recent valid state of the coupling. The function block must be called before decoupling the slave. The data that has been obtained can be used to restore the coupling to the original axis position.

Inputs

VAR_INPUT
   Execute          : BOOL;
   AtMasterPosition : BOOL;
   MasterPosition   : LREAL;
END_VAR

Name	Type	Description
Execute	BOOL	The command is executed with a rising edge at Execute input.
AtMasterPosition	BOOL	If AtMasterPosition is TRUE, the data related to the specified MasterPosition is determined. Otherwise the data refers to the current master position.
MasterPosition	LREAL	Master position to which the data that is determined refers. This input parameter is not necessary if AtMasterPosition is FALSE.

Inputs/outputs

VAR_IN_OUT
   Slave    : AXIS_REF;
END_VAR

Name	Type	Description
Slave	AXIS_REF	Axis data structure of the Slave.

The axis data structure of type AXIS_REF addresses an axis unambiguously within the system. Among other parameters, it contains the current axis status, including position, velocity or error state.

Outputs

VAR_OUTPUT
   Done    : BOOL;
   Busy    : BOOL;
   Error   : BOOL;
   ErrorID : UDINT;
   CamInfo : MC_CamInfoData;
END_VAR

Name	Type	Description
Done	BOOL	Becomes TRUE, if the command was executed successfully.
Busy	BOOL	The Busy output becomes TRUE when the command is started with Execute and remains TRUE as long as the command is processed. If Busy becomes FALSE again, the function block is ready for a new order. At the same time one of the outputs, Done or Error, is set.
Error	BOOL	Becomes TRUE, as soon as an error occurs.
ErrorID	UDINT	If the error output is set, this parameter supplies the error number.
CamInfo	MC_CamInfoData	The CamInfo data structure contains all the data determined about the cam plate coupling