Mitsubishi Electric MELSEC iQ-R16MTCPU, Programming Manual

Page: 175 / 482

3 PARAMETERS FOR POSITIONING CONTROL
3.3 Fixed Parameters
173
3
• Besides setting the upper/lower stroke limit value in the fixed parameters, the range of mechanical system
can also be controlled by using the external limit signals (FLS, RLS).
• When the external limit signal turns off, a deceleration stop is executed. "Deceleration time" and "Rapid stop
deceleration time" can be used in the parameter block for deceleration stop time.
Stroke limit invalid setting
The unlimited length feed is possible by setting the stroke limit to invalid even the control unit is "other than degree axis" (mm,
inch, pulse). When "(Upper stroke limit) = (Lower stroke limit)" is set as the upper and lower stroke limit is set in the fixed
parameter, the stroke limit becomes invalid and the unlimited length feed is possible.
Refer to control in the control unit "degree" for details of degree axis. (

Page 257 Control in the control unit "degree")
• If the current feed value and real current value exceeds 2147483647 [pulse/0.1

m/10
-5
inch], it is controlled
with -2147483648 [pulse/0.1

m/10
-5
inch]. If those values are less than -2147483648 [pulse/0.1

m/10
-
5
inch], it is controlled with 2147483647 [pulse/0.1

m/10
-5
inch].
• The circular interpolation and helical interpolation (other than linear axis) including axis that the stroke limit
is set to invalid cannot be executed. A minor error (error code: 19E8H) will occur, and operation does not
start.
• The high-speed oscillation function cannot be used in the axis that set the stroke limit invalid.
• When executing a speed change to negative speed for the axis with stroke limit set to invalid, the operations
below occur based on the control mode being executed.
0
-2147483648
2147483647
Start point
End point
For an ABS instruction,
it is a shortcut operation.
Current value [pulse/0.1
μ
m/10
-5
inch]
Control mode Operation
Speed control (
³
) Negative speed-change accept.
Speed control (
´
)
Home position return Warning (error code: 09EDH) occurs and speed change is ignored.
Speed-position control Warning (error code: 0991H) occurs and speed change is ignored.
Position follow-up control
Speed control with fixed position stop
Speed-position switching control
JOG operation
Manual pulse generator operation Speed change is ignored.
Speed-torque control
Pressure control
Others Warning (error code: 09EFH) occurs and speed change is ignored.