Mitsubishi Electric QD75P1N User Manual page 425

9 MAJOR POSITIONING CONTROL
In speed control
Speed
Current feed value during speed control start is maintained
(a) Current feed value not updated
Current feed value during 4-axis speed control
The following table shows the " Md.20 Current feed value" during 4-axis speed
control corresponding to the " Pr.21 Current feed value during speed control"
settings. (Note that the reference axis setting values are used for parameters.)
" Pr.21 Current feed value during speed
control" setting
0: Do not update current feed value
1: Update current feed value
2: Zero clear current feed value
Speed
t
Current feed value is updated
(b) Current feed value updated
Restrictions
(1) Set "Positioning complete" in " Da.1 Operation pattern". An axis error
"Continuous path control not possible" (error code: 516) will occur and the
operation cannot start if "continuous positioning control" or "continuous path
control" is set. ("Continuous positioning control" and "continuous path control"
cannot be set in speed control.)
(2) Set the WITH mode in " Pr.18 M code ON signal output timing" when using
an M code. The M code will not be output, and the M code ON signal will not
turn ON if the AFTER mode is set.
(3) Set the "reference axis speed" in " Pr.20 Interpolation speed designation
method". An error "Interpolation mode error" (error code: 523) will occur and
the operation cannot start if a composite speed is set.
The current feed value at speed control start
is maintained.
The current feed value is updated.
The current feed value is fixed at 0.
In speed control
t
9 - 103
MELSEC-Q
Md.20 Current feed value
In speed control
Speed
0
(c) Current feed value zero cleared
t