MLCNVConnectEx

 Function A function calculates a result according to the current value of its inputs. A function has no internal data and is not linked to declared instances. - Connects the output of a pipe to an axis data other than the control position.

Inputs

Input	Data Type	Range	Unit	Default	Description
BlockID	DINT	-2147483648 to 2147483647	N/A	No default	ID number of an initiated Converter object.
AxisID	DINT	-2147483648 to 2147483647	N/A	No default	ID number of an initiated Axis object.
ValueID	DINT	-2147483648 to 2147483647	N/A	No default	Specify this constant: EC_ADDITIVE_TORQUE_VALUE For torque Torque is the tendency of a force to rotate an object about an axis. Just as a force is a push or a pull, a torque can be thought of as a twist feed-forward This describes an element or pathway within a control system which passes a controlling signal from a source in the control system's external environment, often a command signal from an external operator, to a load elsewhere in its external environment. 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 "Programmable Logic Controller" A Programmable Logic Controller, PLC, or Programmable Controller is a digital computer used for automation of industrial processes, such as control of machinery on factory assembly lines. Used to synchronize the flow of inputs from (physical) sensors and events with the flow of outputs to actuators and events 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	Range	Unit	Description
Default (.Q)	BOOL			Returns TRUE if the converter is connected to the Axis object. See Pipe Network - General Rules for more information.

Remarks

• 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.

• 
  
  

• 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.

• 
  

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

• The PDO PDO is a type of protocol frame used in some fieldbuses. A PDO contains one or more object dictionary entries, which define the application data transferred between devices. 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.

Precedence Rules

1. A PLC variable mapped to Analog Output takes precedence In arithmetic and algebra, when a number or expression is both preceded and followed by a binary operation, a rule is required for which operation should be applied first. From the earliest use of mathematical notation, multiplication took precedence over addition, whichever side of a number it appeared on. Thus 3 + 4 × 5 = 5 × 4 + 3 = 23. To change the order of operations, we use parentheses (). Thus, if we want to force addition to precede multiplication, we write (3 + 4) × 5 = 35.
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.

FBD Language Example

FFLD Language Example

IL Language Example

Not available.

ST Language Example

//Connect a converter Pipe Block named “CNV1”  to the pipe block named AXIS1, And 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