Mitsubishi Electric MELSEC-L LD75D, User Manual

Page: 437 / 818

435
CHAPTER 9 MAJOR POSITIONING CONTROL
9
9.
2 Set
ting t
he Pos
itioning
D
at
a
9.2.19
Speed-position switching control (ABS mode)
In case of "speed-position switching control (ABS mode)" ("[Da.2] Control system" = Forward run: speed/position,
Reverse run: speed/position), the pulses of the speed set in "[Da.8] Command speed" are kept output in the axial
direction set to the positioning data. When the "speed-position switching signal" is input, position control to the address
set in "[Da.6] Positioning address/movement amount" is exercised.
"Speed-position switching control (ABS 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.
"Speed-position switching control (ABS mode)" is valid only when "[Pr.1] Unit setting" is "2: degree".
 : Setting possible,  : Setting not possible
*1
*1 If setting is made, the error "Speed-position function selection error" (error code: 935) will occur when the PLC READY
signal (Y0) turns ON.
Use the detailed parameter 1 "[Pr.150] Speed-position function selection" to choose "speed-position switching control
(ABS mode)".
If the set value is other than 0 and 2, it is regarded as 0 and operation is performed in the INC mode.
Refer to

Page 118, Section 5.2 for the information on detail settings.
(1) Switching over from speed control to position control
• The control is switched over from speed control to position control by executing the external command signal
set in "speed-position switching signal".
• Besides setting the positioning data, the "[Cd.24] Speed-position switching enable flag" must also be turned
ON to switch over from speed control to position control. (If the "[Cd.24] Speed-position switching enable
flag" turns ON after the speed-position switching signal turns ON, the control will continue as speed control
without switching over to position control. The control will be switched over from speed control to position
control when the speed-position switching signal turns from OFF to ON again. Only position control will be
carried out when the "[Cd.24] Speed-position switching enable flag" and speed-position switching signal are
ON at the operation start.)
Speed-position function selection
[Pr.1] Unit setting
mm inch degree pulse
INC mode    
ABS mode    
Setting item
Setting
value
Setting details
Buffer memory address
Axis 1 Axis 2 Axis 3 Axis 4
[Pr.150]
Speed-position function
selection
2
Speed-position switching control (ABS
mode)
34 184 334 484
Setting item
Setting
value
Setting details
Buffer memory address
Axis 1 Axis 2 Axis 3 Axis 4
[Cd.24]
Speed-position switching
enable flag
1
Set "1: Switch from speed control to
position control when the external
command signal [CHG] turns ON.".
1528 1628 1728 1828