MC_ReadActPos
Description
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This function or function block returns cached data. See Programming a Dual Core Controller for more information.
Arguments
For more detail on how inputs and outputs work, refer to PLCopen Function Blocks - General Rules
Input
Enable | Description | Request to read the axis's actual position Keeps continuously to read the actual position every 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 cycle, as long as the Enable remains high |
Data type | BOOL | |
Range | 0, 1 | |
Unit | N/A | |
Default | — | |
Axis | Description | Name of a declared instance of the AXIS_REF library function. For more details, About Axis Name and Number) |
Data type | AXIS_REF | |
Range | [1,256] | |
Unit | N/A | |
Default | — |
Output
Valid | Description | Indicates the value at the Position output is available |
Data type | BOOL | |
Busy | Description | Indicates this function block is executing |
Data type | BOOL | |
Error | Description | Indicates an invalid input |
Data type | BOOL | |
ErrorID | Description | Indicates the error if Error output is set to TRUE. |
Data type | INT | |
Position | Description | Actual position of the axis. |
Unit | User unit | |
Data type | LREAL |
Example
Structured Text
(* MC_ReadActPos S T example *) Inst_MC_ReadActPos( TRUE, Axis1 ); //Inst_MC_ReadActPos is an instance of MC_ReadActPos function block ActualPos := Inst_MC_ReadActPos.Position; //store Position output into a user defined variable
Ladder Diagram