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9 MAJOR POSITIONING CONTROL
9.2.16 Speed-position switching control (INC mode)
In "speed-position switching control (INC mode)" ("
run: speed/position, Reverse run: speed/position), the pulses of the speed set in
Da.8
"
Command speed" are kept output on the axial direction set to the positioning
data. When the "speed-position switching signal" is input, position control of the
movement amount set in "
"Speed-position switching control (INC mode)" is available in two different types:
"forward run: speed/position" which starts the axis in the forward run direction and
"reverse run: speed/position" which starts the axis in the reverse run direction.
Use the detailed parameter 1 "
the choice for "speed-position switching control (INC mode)".
Setting item
Speed-
position
Pr.150
function
selection
If the set value is other than 0 and 2, it is regarded as 0 and operation is performed in the
INC mode.
For details of the setting, refer to Section 5.2 "List of parameters".
Switching over from speed control to position control
(1) The control is switched over from speed control to position control by the
external signal "speed-position switching signal".
(2) Besides setting the positioning data, the "
enable flag" must also be turned ON to switch over from speed control to
position control. (If the "
ON after the speed-position switching signal turns ON, the control will continue
as speed control without switching over to position control. Only position
control will be carried out when the "
flag" and speed-position switching signal are ON at the operation start.)
Da.6
Positioning address/movement amount" is exercised.
Speed-position function selection" with regard to
Pr.150
Setting
Setting details
value
Speed-position switching control
0
(INC mode)
Cd.24
Speed-position switching enable flag" turns
Cd.24
9 - 82
MELSEC-Q
Da.2
Control system" = Forward
Buffer memory address
Axis 1
Axis 2
34
184
Cd.24
Speed-position switching
Speed-position switching enable
Axis 3
Axis 4
334
484
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Troubleshooting
