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MELSEC-Q
12 CONTROL SUB FUNCTIONS
12.7.10 Stop command processing for deceleration stop function
The "stop command processing for decelerati on stop function" is provided to set the
deceleration curve if a stop cause occurs dur ing deceleration stop processing
(including automatic deceleration).
This function is valid for both automatic trapezoidal an d S-p att e rn
acceleration/deceleration processing methods.
(For the stop cause, refer to Section 1.2.3 Out line of stopping.)
The "stop command processing for deceleration s top function"
performs the following two operations:
(1) Deceleration curve re-processing
Re-processes a deceleration curve starting from the speed at stop cause
occurrence to stop, according to the preset deceleration time.
(2) Deceleration curve continuation
Continues the current deceleration curve after a stop cause has o ccur re d.
This section explains the "stop command proc essing for deceleration stop function" as
follows:
[1] Control
[2] Precautions for control
[3] Setting method
[1] Control
The operation of "stop command processing f or deceleration stop function" is
explained below.
(1) Deceleration curve re-processing
A deceleration curve is re-processed starting f rom the speed at stop cause
occurrence to stop, according to the preset deceleration time.
If a stop cause occurs during automatic deceler ation of position control, the
deceleration stop processing stops as soon as th e target has reached the
positioning address specified in the posit ioning data that is currently
executed.
Stop cause
occurrence
t
V
Deceleration stop
processing (automatic
deceleration) start
Deceleration curve according
to preset deceleration time
Deceleration curve when stop
cause does not occur
Immediate stop at the specified
positioning address
Fig. 12.53 Deceleration curve re-processin g operation (for position control or S-patt ern
acceleration/deceleration processing)