Step Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

Step function

The "step function" is used to confirm each operation of the positioning control one by one.
It is used in debugging work for major positioning control, etc.
A positioning operation in which a "step function" is used is called a "step operation".
In step operations, the timing for stopping the control can be set. (This is called the "step mode".) Control stopped by a step
operation can be continued by setting "step continues (to continue the control)" in the "step start information".
Relation between the step function and various controls
The following table shows the relation between the "step function" and various controls.
: Set when required, : Setting not possible
Control type
Home position return
control
Major positioning control
Manual control
Expansion control
Step mode
In step operations, the timing for stopping the control can be set. This is called the "step mode". (The "step mode" is set in the
control data "[Cd.34] Step mode".)
The following shows the two types of "step mode" functions.
■Deceleration unit step
The operation stops at positioning data requiring automatic deceleration. (A normal operation will be carried out until the
positioning data requiring automatic deceleration is found. Once found, that positioning data will be executed, and the
operation will then automatically decelerate and stop.)
■Data No. unit step
The operation automatically decelerates and stops for each positioning data. (Even in continuous path control, an automatic
deceleration and stop will be forcibly carried out.)
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Machine home position return control
Fast home position return control
Position control 1-axis linear control
2 to 4-axis linear interpolation control
1-axis fixed-feed control
2 to 4-axis fixed-feed control (interpolation)
2-axis circular interpolation control
3-axis helical interpolation control
1 to 4-axis speed control
Speed-position switching control, Position-speed switching control
Other control Current value changing
JUMP instruction, NOP instruction, LOOP to LEND
JOG operation, Inching operation
Manual pulse generator operation
Speed-torque control
search engine
Step function Step applicability

Step operation not possible


Step operation possible





 Step operation not possible

Step operation possible


Step operation not possible
 Step operation not possible


8 CONTROL SUB FUNCTIONS
8.7 Functions Related to Stop
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