Speed Limit; Relevant Variables; How To Set The Speed Limit Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

9.2

Speed Limit

The "speed limit function" limits the set velocity to a value within the speed limit value setting range when the set velocity
during control exceeds the speed limit value. By limiting the set velocity within the preset speed limit value setting range, even
if an incorrect command or unexpected operation occurs, damage to the machine can be prevented.

Relevant variables

Variable/Structure name
AxisName.Pr.
VelocityLimit_Positive
VelocityLimit_Negative
VelocityLimit_OverOperation
AxesGroupName.Pr.
VelocityLimit

How to set the speed limit function

Speed limit value for each axis
Set the parameters, AxisName.Pr.VelocityLimit_Positive and AxisName.Pr.VelocityLimit_Negative, for each axis. If a value
which is outside the setting range is input, the error "Out of Forward Direction Speed Limit Value Setting Range" (error code:
1A08H) or the error "Out of Reverse Direction Speed Limit Value Setting Range" (error code: 1A09) will occur.
Setting item
VelocityLimit_Positive
VelocityLimit_Negative
Speed limit value for each axes group
Set the parameter, AxesGroupName.Pr.VelocityLimit, for each axes group.
Setting item
VelocityLimit
When the speed after override becomes the value within 0 to the speed limit lower value (0.0001), the speed
will be 0.
9 RELEVANT FUNCTIONS TO VELOCITY
318
9.2 Speed Limit
Name
Positive direction speed limit value
Negative direction speed limit value
Speed limit value over operation
setting
Speed limit value
Setting range
0.0001  Setting value  2500000000.0
Setting range
0.0001  Setting value  2500000000.0
Details
Sets the address increasing direction speed limit value for each axis.
Sets the address decreasing direction speed limit value for each axis.
Sets the operation when the speed limit value during control is exceeded.
0: Ignore (Ignore)
3: ImmediateStop (Immediate stop)
Sets the speed limit value of the axes group.
Setting details
Sets the speed limit value (the maximum speed during control) for the
positive direction operation.
Sets the speed limit value (the maximum speed during control) for the
negative direction operation.
Setting details
Sets the speed limit value (the maximum speed during control) of the axes
group.