Mitsubishi Electric MELSEC-Q QD75M, User Manual

Page: 617 / 858

12 - 78
MELSEC-Q
12 CONTROL SUB FUNCTIONS
12.7.6 Command in-position function
The "command in-position function" checks the remaining distance to the stop position
during the automatic deceleration of positioning control, and sets "1". This flag is called
the "command in-position flag". The command in-position flag is used as a front-
loading signal indicating beforehand the completion of the position control.
The details shown below explain about the "command in-position function".
[1] Control details
[2] Precautions during control
[3] Setting the command in-position function
[4] Confirming the command in-position flag
[1] Control details
The following shows control details of the command in-position function.
(1) When the remaining distance to the stop position during the automatic
deceleration of positioning control becomes equal to or less than the value
set in "
Pr.16
Command in-position width", "1" is stored in the command
in-position flag (
Md.31
Status: b2).
(Command in-position width check)
Remaining distance
≤
" Pr.16 Command in-position width" setting value
Command in-position
width setting value
Positioning
V
t
ON
OFF
Command in-position flag
[ Md.31 Status : b2]
Fig. 12.41 Command in-position operation
(2) A command in-position width check is carried out every 3.5ms.