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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 1-axis speed control
The following table shows the "
control corresponding to the "
settings.
" 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
In speed control
Speed
t
Current feed value is updated
(b) Current feed value updated
Restrictions
(1) Set "Positioning complete" in "
"Continuous path control not possible (error code: 516)" will occur and the
operation cannot start if "continuous positioning control" or "continuous path
Da.1
control" is set in "
("Continuous positioning control" and "continuous path control" cannot be set
in speed control.)
(2) Set the WITH mode in "
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) An error "No command speed" (error code: 503) will occur if the current speed
Da.8
(-1) is set in "
command speed".
(4) The software stroke limit check will not carried out if the control unit is set to
"degree".
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Md.20
Current feed value" during 1-axis speed
Pr.21
Current feed value during speed control"
The current feed value at speed control start
is maintained.
The current feed value is updated.
The current feed value is fixed at 0.
Speed
t
(c) Current feed value zero cleared
Da.1
Operation pattern". An axis error
Operation pattern".
Pr.18
M code ON signal output timing" when using
9 - 68
MELSEC-Q
Md.20 Current feed value
In speed control
0
t
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