MC_WriteParam: Write tag of positioning axis as of V6 (S7-1200) - Motion Control

S7-1200 Motion Control (S7-1200)
ft:publication_title
S7-1200 Motion Control (S7-1200)
Product
Motion Control
Version
V20
Publication date
11/2024
Language
en-US
MC_WriteParam: Write tag of positioning axis as of V6

Description

Motion Control instruction "MC_WriteParam" enables the writing of tags of the positioning axis technology object in the user program. In contrast to the value assignment of the tags in the user program, "MC_WriteParam" can also change values of read-only tags.

You can learn about the tags, the conditions under which they can be written and the time at which they take effect in the description of the technology object tags.

Requirements

  • The positioning axis technology object has been configured correctly.

  • To write tags that are read-only in the user program, the axis must be disabled.

  • Tags whose change requires a restart cannot be written with "MC_WriteParam".

Override response

A MC_WriteParam command cannot be aborted by any other Motion Control command.

A new MC_WriteParam command does not abort any active Motion Control commands.

Parameters

Parameter

Declaration

Data type

Default value

Description

Parameter

INPUT

VARIANT (BOOL, INT, DINT, UDINT, REAL)

-

VARIANT pointer to the technology object tags positioning axis (destination address) to be written

Value

INPUT

VARIANT (BOOL, INT, DINT, UDINT, REAL)

-

VARIANT pointer to the value to be written (source address)

Execute

INPUT

BOOL

FALSE

Start of the command with a positive edge

Done

OUTPUT

BOOL

FALSE

TRUE

Value was written

Busy

OUTPUT

BOOL

FALSE

TRUE

The command is being executed

Error

OUTPUT

BOOL

FALSE

TRUE

An error occurred during execution of the command. The cause of the error can be found in parameters "ErrorID" and "ErrorInfo".

ErrorID

OUTPUT

WORD

16#0000

Error ID for parameter "Error"

ErrorInfo

OUTPUT

WORD

16#0000

Error info ID for parameter "ErrorID"