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M800V/M80V Series PLC Programming Manual (2/2)
14 PLC Help Function
14.2 Manual Speed Command
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Signal name
MANUAL SPEED COMMAND RE-
A
VERSE RUN VALID
[Function]
This signal allows the manual speed command in the (-) direction to reverse the movement against the program.
[Operation]
When this signal turns ON during the manual speed is commanded, a speed command in the (-) direction in handle or
JOG mode reverses the movement against the program.
When this signal is OFF, a command in the (-) direction makes the same movement as commanded in the (+) direction:
the movement follows the program.
[Caution]
(1) The reverse run is available within the block in execution. The reversed axis movement stops at the start point of the
block in execution.
(2) Unless all the axes stop, this signal cannot be changed ON/OFF. The ON/OFF change of this signal during the axis
movement is realized after all the axes have stopped.
(3) The reverse run is not allowed in the following operations. The axis stays stopped if a speed command is given in the
(-) direction.
In the reference position return (G28, G29). When G28 is commanded, however, the reverse run is available from the
start point and to the intermediate point. When G29 is commanded, the reverse run is available from the intermediate
point to the end point.
In cutting cycle in the synchronous or asynchronous tap.
In shift amount operation in a fixed cycle.
In tool center point control.
In normal line control.
In milling interpolation, pole coordinate rotation or cylindrical interpolation.
When the thread cutting command (G33) is given.
In exponential interpolation.
In spline interpolation.
In NURBS interpolation.
In tool change position return or 2nd/3rd/4th reference position return (from the intermediate point to the block end).
[Related signals]
(1) Manual speed command valid (YC9D)
(2) Manual speed command sign reversed (YC9E)
Signal abbre-
$1
$2
viation
YC9F
YDDF
579
$3
$4
YF1F
Y105F
IB-1501668-B
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