Upper Stroke Limit Value/Lower Stroke Limit Value - Mitsubishi Electric A173UHCPU Programming Manual

4. PARAMETERS FOR POSITIONING CONTROL
4.2.2

Upper stroke limit value/lower stroke limit value

RLS
Lower stroke limit
Fig. 4.1 Travel Range When Setting the Upper Stroke Limit Value and Lower Stroke Limit Value
Operation Started
Positioning control
Fixed-pitch feed control
Speed control (I)
Speed control (II)
Speed/position switching control
(including restart)
JOG operation
Speed switching control
Constant-speed control
Position follow-up control
Manual pulse generator operation
These are the settings for the upper limit value and lower limit value in the travel
range of the mechanical system.
(Travel range of the machine)
(1) Stroke limit range check
The stroke limit range check is executed when the operations indicated in the
table below are started or while they are in progress.
Check Executed/
Not Executed
Executed
Executed
Not executed
Executed
Executed
Executed
Executed
Executed
Executed
POINTS
(1) Besides setting the stroke limit upper limit value/lower limit value in the
fixed parameters, the stroke limit range can also be set by using the
external limit signals (FLS, RLS).
(2) When the external limit signal goes OFF, a deceleration stop is executed.
The time taken to decelerate to a stop can be set by setting the
"deceleration time" and "rapid stop deceleration time" in the parameter
block.
Upper stroke limit
• When positioning is started, it is checked whether the feed current value
is within the stroke limit range or not. If it outside the range, an error
occurs (error code 106) and positioning is not executed.
• When circular interpolation is in progress, if the interpolation path goes
outside the stroke limit range, an error occurs (error codes: 207, 208)
and axis motion decelerates to a stop.
• The current value becomes "0", and motion continues until the external
limit signal (FLS, RLS, STOP) is received.
• The check is executed after the switch to position control.
• If the current value goes outside the stroke limit range, motion stops.
Travel in the direction that returns the axis into the stroke range is
possible.
• While positioning is in progress, it is checked whether the feed current
value is within the stroke limit range. If it outside the range, an error
occurs (error code 106) and positioning is not executed.
• If the current value goes outside the stroke limit range, motion stops.
4 − 5
Limit switch for
emergency stop
FLS
Remarks
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