MCV_BlockSearchSetBlockNumber

This FB defines the continuation position by the block number (N word) of a line containing NC commands. Optionally the continuation position can also be found after the block number has occurred n times.

Block diagram

FB parameters

VAR_IN_OUT

Variable name

Data type

Description

AxesGroup

AXES_GROUP_REF

Axis group reference

VAR_INPUT

Variable name

Data type

Description

Execute

BOOL

The values of the inputs are transferred to the MC on the rising edge to define the search for the continuation position.

CoveredDistance

LREAL

If the continuation position searched for is not at the start of the NC program line defined by the value specified at the “BlockCount” input, this input specifies which portion of the distance programmed in the NC program line defines the continuation position.

Unit: 0.1%

DistProgStart

LREAL

This defines the continuation position search for by means of the distance covered since program start or since the last NC command #DISTANCE PROG START CLEAR. This can also define a continuation position located between the start and end of a motion block.

Unit: 0.1µm

AutoReturn

BOOL

This option defines whether the axes are enabled to move directly to the continuation position after the continuation position is found and after the signal that the MC is waiting for the enable to move to the contour ("WaitReturnToPath" output at the FB MCV_BlockSearchCtrl).

If this option is TRUE, the value at the “Deviation” input is not invoked to check the deviation between the continuation position and the actual position of the axes.

NoHoldAtRestart

BOOL

If this input is TRUE, the NC program continues its execution immediately after the enable signal to move to the contour without any nurther user input.

Deviation

UDINT

The value defines the maximum permissible deviation of the axis position from the continuation position after the continuation position is found.

Unit: 0.1µm

BreakpointPosition

LREAL

Indicates an additional breakpoint position as distance from program start.

The breakpoint must be located after the continuation position.

Unit: 0.1µm

BlockNumber

UDINT

This input defines the continuation position by the block number. The block number is the number (N word) of an NC line in the NC program.

Note

To generate the NC program, the operator or the system is responsible for providing every line which is relevant later, even only once, with a unique block number.

PassCounter

UDINT

Since the block number is detected several times, e.g. in loops, it is not always unique on its own. In this case, the continuation position may be optionally defined by the additional specification of a pass counter.

VAR_OUTPUT

Variable name

Data type

Description

Done

BOOL

TRUE indicates that the block search parameters were successfully written to the Motion Controller.

Busy

BOOL

TRUE indicates that the FB is executing a command

Error

BOOL

TRUE indicates that an error occurred

ErrorID

WORD

Error identifier