102BTechnology instructions
9.3 Basic motion control
S7-1200 Programmable controller
System Manual, 11/2011, A5E02486680-05
349
9.3.2.2
MC_Reset instruction
Table 9- 26 MC_Reset instruction
LAD / FBD
SCL
Description
"MC_Reset_DB"(
Axis:=_multi_fb_in_,
Execute:=_bool_in_,
Done=>_bool_out_,
Busy=>_bool_out_,
Error=>_bool_out_,
ErrorID=>_word_out_,
ErrorInfo=>_word_out_);
Use the MC_Reset instruction to acknowledge
"Operating error with axis stop" and
"Configuration error". The errors that require
acknowledgement can be found in the "List of
ErrorIDs and ErrorInfos" under "Remedy".
Before using the MC_Reset instruction, you
must have eliminated the cause of a pending
configuration error requiring acknowledgement
(for example, by changing an invalid
acceleration value in "Axis" technology object
to a valid value).
1
STEP 7 automatically creates the DB when you insert the instruction.
2
In the SCL example, "MC_Reset_DB" is the name of the instance DB.
The MC_Reset task cannot be aborted by any other motion control task. The new MC_Reset
task does not abort any other active motion control tasks.
Table 9- 27 Parameters of the MC_Reset instruction
Parameter and type
Data type
Description
Axis
IN
TO_Axis_1
Axis technology object
Execute
IN
Bool
Start of the task with a positive edge
Done
OUT
Bool
TRUE = Error has been acknowledged.
Busy
OUT
Bool
TRUE = The task is being executed.
Error
OUT
Bool
TRUE = An error has occurred during execution of the task. The
cause of the error can be found in parameters "ErrorID" and
"ErrorInfo".
ErrorID
OUTP
Word
Error ID for parameter "Error""
ErrorInfo
OUT
Word
Error info ID for parameter "ErrorID"
To acknowledge an error with MC_Reset, follow these steps:
1.
Check the requirements indicated above.
2.
Start the acknowledgement of the error with a rising edge at the Execute input parameter.
3.
The error has been acknowledged when Done equals TRUE and the technology object
tag <Axis name>.StatusBits.Error equals FALSE.
