Mc_Movejog (Move Axis In Jog Mode) Instruction - Siemens S7-1200 System Manual

Note
Behavior with zero set velocity (Velocity = 0.0)
An MC_MoveVelocity task with "Velocity" = 0.0 (such as an MC_Halt task) aborts active
motion tasks and stops the axis with the configured deceleration. When the axis comes to a
standstill, output parameter "InVelocity" indicates TRUE for at least one program cycle.
"Busy" indicates the value TRUE during the deceleration operation and changes to FALSE
together with "InVelocity". If parameter "Execute" = TRUE is set, "InVelocity" and "Busy" are
latched.
When the MC_MoveVelocity task is started, status bit "SpeedCommand" is set in the
technology object. Status bit "ConstantVelocity" is set upon axis standstill. Both bits are
adapted to the new situation when a new motion task is started.
9.3.5.9

MC_MoveJog (Move axis in jog mode) instruction

Table 9- 43 MC_MoveJog instruction
LAD / FBD
STEP 7 automatically creates the DB when you insert the instruction.
1
In the SCL example, "MC_MoveJog_DB " is the name of the instance DB.
2
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
SCL
"MC_MoveJog_DB"(
Axis:=_multi_fb_in_,
JogForward:=_bool_in_,
JogBackward:=_bool_in_,
Velocity:=_real_in_,
InVelocity=>_bool_out_,
Busy=>_bool_out_,
CommandAborted=>_bool_out_,
Error=>_bool_out_,
ErrorID=>_word_out_,
ErrorInfo=>_word_out_);
Technology instructions
9.3 Motion control
Description
Use the MC_MoveJog instruction to move
the axis constantly at the specified
velocity in jog mode. This instruction is
typically used for testing and
commissioning purposes.
In order to use the MC_MoveJog
instruction, the axis must first be enabled.
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