Mitsubishi Electric MELSEC-L LD75D, User Manual

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CHAPTER 12 CONTROL SUB FUNCTIONS
12
12.
1 O
ut
line of
Sub F
un
cti
ons
*1 The near pass function is validated only when the machine of the standard specification carries out the position control
with the continuous path control mode. It cannot be invalidated with parameters.
*2 To carry out "torque limit", the "D/A conversion module" and a "drive unit capable of the torque limit command with an
analog voltage" must be prepared.
*3 An I/O module (or general-purpose I/O function of LCPU) with arbitrary number of points and "the drive unit capable of
configuring an absolute position detection system, which is a Mitsubishi Electric General-Purpose AC Servo and has an
absolute position detection function (absolute position data transference protocol) equivalent to that of MR-J3-
 A," are
required to execute the "absolute position restoration function".
Other Functions
Step function
This function temporarily stops the operation to confirm the positioning operation during
debugging, etc.
The operation can be stopped at each "automatic deceleration" or "positioning data".
Skip function
This function stops the positioning being executed (decelerates to a stop) when the skip signal is
input, and carries out the next positioning.
M code output function
This function issues a sub work (clamp or drill stop, tool change, etc.) according to the code No.
(0 to 65535) set for each positioning data.
Teaching function
This function stores the address positioned with manual control into the positioning address
(Da.6 Positioning address/movement amount) having the designated positioning data No.
Command in-position function
At each automatic deceleration, this function calculates the remaining distance for the LD75 to
reach the positioning stop position, and when the value is less than the set value, sets the
"command in-position flag" to 1.
When using another sub work before ending the control, use this function as a trigger for the sub
work.
Acceleration/deceleration processing
function This function adjusts the control acceleration/deceleration (acceleration/deceleration time and
curve).
Pre-reading start function This function shortens the virtual start time.
Deceleration start flag function
Function that turns ON the flag when the constant speed status or acceleration status switches to
the deceleration status during position control, whose operation pattern is "Positioning complete",
to make the stop timing known.
Stop command processing for
deceleration stop function Function that selects a deceleration curve when a stop cause occurs during deceleration stop
processing to speed 0.
Sub function Details