Speed Limit Function - Mitsubishi MELSEC-Q Series User Manual

11
AUXILIARY FUNCTION
11.2

Speed Limit Function

If the command speed exceeds the "Speed limit value" during control, this function limits
the command speed to within the "Speed limit value" setting range.
(1) Relation between the speed limit function and each control
Control type
Machine OPR control
OPR
control Fast OPR control
Position control
(1-axis linear control)
Positioning
Speed control
control
Current value change
JOG operation
: Setting is required.
- : Setting not required (Setting value is invalid. If setting, use the default value or a value within the range where
no error occurs.)
(2) Setting the speed limit function
11
- 2 11.2 Speed Limit Function
The following table shows the relation between the "speed limit function" and each
control.
Table 11.2 Relation between the speed limit function and each control
Speed
Speed limit
limit
value
function
Speed limit
Pr.4
value
Setting value is
-
invalid.
Speed limit
Pr.4
value
To use the "speed limit function", set the "speed limit value" in the parameter as
shown in the following table, and write it to the QD72P3C3. (The "speed limit value"
depends on the motor used. Set it according to the motor used.)
The setting contents are enabled when the programmable controller CPU READY
signal (Y0) is turned from OFF to ON.
Setting
Setting item
value
Speed limit
Pr.4
value
* For details of the setting contents, refer to "Section 4.2 Parameter List".
Operation when speed limit value is exceeded
Does not operate.
"Out of OPR speed setting range (error code: 913)" error
or "Out of creep speed setting range (error code: 914)"
error occurs.
(Refer to Section 4.2 Parameter List.)
"Out of speed range" warning (warning code: 20) occurs,
and the axis is controlled by the speed limit value.
"Out of speed range" warning (warning code: 20) occurs,
and the axis is controlled by the speed limit value.
Table 11.3 Relevant parameter
Setting contents
Set the speed limit value (maximum speed
during control).
-
Factory
default value
8000
(pulse/s)