Mc_Movevelocity (Move Axis At Predefined Velocity) - Siemens SIMATIC S7-1200 System Manual
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10.3.7.8
MC_MoveVelocity (Move axis at predefined velocity)
Table 10- 68 MC_MoveVelocity instruction
LAD / FBD
STEP 7 automatically creates the DB when you insert the instruction.
1
In the SCL example, "MC_MoveVelocity_DB " is the name of the instance DB.
2
Table 10- 69 Parameters for the MC_MoveVelocity instruction
Parameter and type
Axis
Execute
Velocity
Direction
Current
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
SCL
"MC_MoveVelocity_DB"(
Axis:=_multi_fb_in_,
Execute:=_bool_in_,
Velocity:=_real_in_,
Direction:=_int_in_,
Current:=_bool_in_,
PositionControlled:=_bool_in_,
InVelocity=>_bool_out_,
Busy=>_bool_out_,
CommandAborted=>_bool_out_,
Error=>_bool_out_,
ErrorID=>_word_out_,
ErrorInfo=>_word_out_);
Data type
IN
TO_SpeedAxis
IN
Bool
IN
Real
IN
Int
IN
Bool
Description
Axis technology object
Start of the task with a positive edge (Default value: False)
Velocity specification for axis motion (Default value: 100.0)
Limit values: Start/stop velocity ≤ |Velocity| ≤ maximum velocity
(Velocity = 0.0 is allowed)
Direction specification:
0: Direction of rotation corresponds to the sign of the value in
•
parameter "Velocity" (Default value)
1: Positive direction of rotation (The sign of the value in param-
•
eter "Velocity" is ignored.)
2: Negative direction of rotation (The sign of the value in pa-
•
rameter "Velocity" is ignored.)
Maintain current velocity:
FALSE: "Maintain current velocity" is deactivated. The values
•
of parameters "Velocity" and "Direction" are used. (Default val-
ue)
TRUE: "Maintain current velocity" is activated. The values in
•
parameters "Velocity" and "Direction" are not taken into ac-
count.
When the axis resumes motion at the current velocity, the "In-
Velocity" parameter returns the value TRUE
Technology instructions
10.3 Motion control
Description
Use the MC_MoveVelocity instruc-
tion to move the axis constantly at
the specified velocity.
In order to use the
MC_MoveVelocity instruction, the
axis must first be enabled.
.
747
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