MLCNVConnectEx

 Function - Connects the output of a pipe to an axis data other than the control position.

• This function:
  • Connects an extra converter Pipe Block to the specified axis.
  • Connects several converter Pipe Blocks to the same axis and acts on different data.
• Normally a Converter block sends position values to an Axis.
  • However, some cases exist that require additional information (e.g., torque feed-forward (IDN 3056)) that needs to be provided by a second converter.
• The PDO values are overwritten by Mapped PLC variables including either:
  • A possible link to the mapping of variables.
  • The section on MLParamWrite() warning indicating that the function block write of Analog output is overwritten by the MLCnvConnectEx function.

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• • This function or function block returns cached data.
  • See Program a Multi-Core Controller.

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• • This FB does NOT work if you have Simulated the device.
  • In this instance, the FB continuously generates error messages in the Controller log window.

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• Add 16#8000 to the designated IDN number for ValueID input. 8000 in hexadecimal signals a vendor-specific IDN value.

Precedence Rules

1. A PLC variable mapped to Analog Output takes precedence.
2. If MLCNVConnect assigns a Pipe output to an Analog Output, it takes precedence over a DriveParamWrite function call.
3. DriveParamWrite modifies the Analog Output but is overwritten by the higher precedent options if they are present.

Inputs

Input	Data Type See Data Types.	Range	Unit	Default	Description
BlockID	DINT	1 to 1024	N/A	No default	ID number of an initiated Converter object.
AxisID	DINT	1 to 256	N/A	No default	ID number of an initiated Axis object.
ValueID	DINT	Enumerated	N/A	No default	Specify this constant: EC_ADDITIVE_TORQUE_VALUE For torque feed-forward. EC_ANALOG_OUTPUT For control of Analog Output: AKD parameter: AOUT.VALUEU . See Example: Pre-defined Constants for more information. If the Analog Output is mapped to a PLC variable, the connection to the analog output by EC_ANALOG_OUTPUT does not work because the output value is overwritten by the PLC mapped variable data. To function properly, the AOUT.MODE must be set to User Mode (mode = 0).
ValueInfo	DINT	-2147483648 to 2147483647	N/A	No default	This value is ignored. It must be set to 0 (zero).

Outputs

Output	Data Type See Data Types.	Range	Unit	Description
Default (.Q)	BOOL	FALSE, TRUE	N/A	Returns TRUE if the converter is connected to the Axis object. See Pipe Network - General Rules.

FBD Language Example

FFLD Language Example

IL Language Example

Not available.

ST Language Example

//Connect a converter block named "CNV1" to the AXIS1 block. 
//Send feed-forward (EC_ADDITIVE_TORQUE_VALUE) to the drive. 
MLCNVConnectEx( PipeNetwork.CNV1, PipeNetwork.AXIS1, EC_ADDITIVE_TORQUE_VALUE, 0 );

See Also

• MLCNVConnect
• MLCNVDisconnect
• MLCNVInit