Mitsubishi MELSEC-Q QD77MS, User Manual

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Chapter 12 Expansion Control
[3] Speed control mode
Operation for speed control mode
The speed control is executed at speed set in "
Cd.140
Command speed at speed
control mode
" in the speed control mode. Set a positive value for forward rotation
and a negative value for reverse rotation. "
Cd.140
" can be changed any time
during speed control mode.
Acceleration/deceleration is a trapezoidal acceleration/deceleration processing.
Set acceleration/deceleration time toward "
Pr.8
Speed limit value
" in "
Cd.141
Acceleration time at speed control mode
" and "
Cd.142
Deceleration time at speed control
mode
". The value at speed control mode switching request is valid for "
Cd.141
"
and "
Cd.142
".
The command speed during speed control mode is limited with "
Pr.8
Speed limit
value
". If the speed exceeds speed limit value is set, a warning "Speed limit value
over" (warning code: 501) will occur, the operation is controlled with speed limit
value.
Confirm the command speed to servo amplifier with "
Md.122
Speed during
command
".
Cd.142
Deceleration time at
speed control mode
0
t
V
0
20000 30000 -10000 -20000 0 0
Pr.8 Speed limit value
30000
20000
-10000
-20000
Pr.8 Speed limit value
Md.122
The command speed to servo amplifier is stored
in " Speed during command.
Cd.141
Acceleration time at
speed control mode
Cd.140 Command speed at
speed control mode
Cd.141
Acceleration time at
speed control mode
Cd.142
Deceleration time at
speed control mode
Current feed value during speed control mode
"
Md.20
Current feed value
", "
Md.21
Machine feed value
" and "
Md.101
Real current
value
" are updated even in speed control mode.
If the current feed value exceeds the software stroke limit, an error "Software
stroke limit +, -" (error code: 507, 508) will occur and the operation is switched to
position control mode. Invalidate the software stroke limit to execute one-way feed.