200
7 EXPANSION CONTROL
7.1 Speed-torque Control
■
Operation for "Speed control mode
Torque control mode switching"
When the speed control mode is switched to the torque control mode, the command torque immediately after the switching is
the torque set in "Torque initial value selection (b4 to b7)" of "[Pr.90] Operation setting for speed-torque control mode".
When the servo parameter "Function selection C-B POL reflection selection at torque control (PC29)" is set to
"0: Enabled" and "Torque initial value selection" is set to "1: Feedback torque", the warning "Torque initial
value selection invalid" (warning code: 09E5H) will occur at control mode switching, and the command value
immediately after switching is the same as the case of selecting "0: Command torque". If the feedback torque
is selected, set "1: Disabled" in the servo parameter "Function selection C-B POL reflection selection at torque
control (PC29)".
When the torque control mode is switched to the speed control mode, the command speed immediately after the switching is
the motor speed at switching.
The following chart shows the operation timing for axis 1.
■
RD77MS4 operation example
Torque initial value selection ([Pr.90]: b4 to b7)
Command torque to servo amplifier immediately after switching from speed
control mode to torque control mode
0: Command torque
The value of "[Cd.143] Command torque at torque control mode" at switching.
1: Feedback torque
Motor torque value at switching.
0
1
0
1
0
10
20
10
0
0
200
0
31
32
30
30
31
[1, 0]
ON
[0, 1]
[1, 0]
t
Torque
20.0%
[Cd.138] Control mode switching request
[Cd.139] Control mode setting
[Cd.140] Command speed at speed
control mode
[Cd.143] Command torque at torque
control mode
[Md.26] Axis operation status
BUSY signal [X10]
Control mode
([Md.108] Servo status1: b2, b3)
50000
[Cd.146] Speed limit value at torque
control mode
t
V
30000
0
0
Speed control mode
Torque control mode
Speed control mode
0
30000
20000
6 to 11 ms
6 to 11 ms
20000
Summary of Contents for RD77MS16
Page 1: ...MELSEC iQ R Simple Motion Module User s Manual Application RD77MS2 RD77MS4 RD77MS8 RD77MS16 ...
Page 2: ......
Page 316: ...314 9 COMMON FUNCTIONS 9 4 External Input Signal Select Function Program example ...
Page 317: ...9 COMMON FUNCTIONS 9 4 External Input Signal Select Function 315 9 ...
Page 575: ...13 PROGRAMMING 13 4 Positioning Program Examples 573 13 Error reset program Axis stop program ...
Page 643: ......