BM_MoveAbsoluteInit

Description

BM_MoveAbsoluteInit reads the mode (parameter 110.2) of the controller in order to forward a setting information of this controller parameter to BM_MoveAbsolute, so that this parameter setting does not drop away during the activation of BM_MoveRelative.

Parameter input	Data type	Description
Execute	BOOL	Edge-sensitive execution

Parameter output	Data type	Description
Done	BOOL	Successfully
Busy	BOOL	Parameter read/write active
CommandAborted	BOOL	Without function
Error	BOOL	Parameter read/write error; error ID valid
ErrorID	DWORD	Communication Error ID Siemens error list

Parameter input and output	Data type	Description
Axis	UDT	BM Motion Control axis variable

Description

The command BM_MoveRelative executes a controlled absolute positioning originating from the positioning actual value, the parameter 118.2 by BM_MoveAbsolute bit 4 (start the positioning of start bit in the control word bit 4) is set to 1. If there is no information of BM_MoveAbsoluteInit the other bits of this parameter are set to 0, as well.

Edge-sensitive version:

In order to execute the command the input Execute can be TRUE for one cycle. Then the command is executed, the result Done is signaled for one cycle, only (see diagram 1). If the input Execute = 1 the command is executed, the result DONE = 1. Done is reset if the input Execute = 0. (see diagram 2)

Diagram of the edge-sensitive execution:

Diagram 1:

Diagram 2:

Status control:

Command is not supposed to be activated at all "BM".AXIS[x].DRIVE.BM_AXIS_STATUS.ParmRW_Active =1, Reset error by BM_Reset.

Recommended task:  OB1.

Note:

A command from "BM_MoveAbsoluteInit" must not be activated before a command from another function block has been not successfully executed.

If an error occurs during the command execution, the error must be reset with "BM_Reset". Function block command will be executed successfully at

"BM" .AXIS [x] .DRIVE.BM_AXIS_STATUS.ParmRW_Active = 0.

Input Execute:

TRUE: Edge-sensitive execution.
FALSE: No execution.

Output Done:

TRUE = the command was successfully executed.
FALSE = Command is activated or not possible.

Output Busy:

TRUE:  the service communication for the Read/write parameter is activated or the target positioning was not reached yet during a started positioning.
FALSE: Not activated.

Output CommandAborted:
No function

Output Error:

TRUE: There is an error at service communication of Read/write parameter. Information to ErrorID is valid and for error information refer to S7 description.

FALSE: No error.

Output ErrorID:

The information of service communication error (for detailed information refer to S7 description)

In and output Axis:

Symbolic BM Motion control axis variable of the UDT type.

During the programming with the data component DB5 (symbolic "BM") it must be written with the following symbol text: "BM".AXIS[x] (x is the drive axis number).