MITSUBISHI ELECTRIC Mitsubishi Programmable Logic Controller QD75D - Manual (Page 535)

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MELSEC-Q
12 CONTROL SUB FUNCTIONS
[2] 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.
(1) 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.)
(2) 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.)
[3] Step start information
Control stopped by a step operation can be continued by setting "step continue"
(to continue the control) in the "step start information". (The "step start
information" is set in the control data " Cd.36 Step start information".)
The following table shows the results of starts using the "step start information"
during step operation.
Stop status in the step
operation
Md.26 Axis operation
status
Cd.36 Step start
information
Step start results
1 step of positioning
stopped normally
Step standing by 1: Step continue The next positioning data is executed.
The warnings "Step not possible (warning code: 511)" will occur if the " Md.26
Axis operation status" is as shown below or the step valid flag is OFF when step
start information is set.
Md.26 Axis operation status Step start results
Standing by
Stopped
In interpolation
In JOG operation
In manual pulse generator operation
Analyzing
Waiting for special start
In OPR
In position control
In speed control
In speed control of speed-position switching control
In position control of speed-position switching control
In speed control of position-speed switching control
In position control of position-speed switching control
Step not continued by warning