Mitsubishi Electric MELSEC-Q Series User Manual page 598

[2] Speed control mode
Operation for speed control mode
The speed control is executed at the 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 the speed control mode.
Acceleration/deceleration is performed based on 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 the speed control mode is limited with "[Pr.8] Speed
limit value". If the speed exceeding the speed limit value is set, the warning
"Speed limit value over" (warning code: 501) occurs, and the operation is
controlled with the speed limit value.
Confirm the command speed to servo amplifier with "[Md.122] Speed during
command".
V
Pr.8 Speed limit value
30000
20000
0
-10000
-20000
Pr.8 Speed limit value
Cd.140 Command speed at
speed control mode
Feed current value during speed control mode
"[Md.20] Feed current value", "[Md.21] Feed machine value" and "[Md.101] Real
current value" are updated even in the speed control mode.
If the feed current value exceeds the software stroke limit, the error "Software
stroke limit +" (error code: 507) or "Software stroke limit -" (error code: 508) occurs,
and the operation switches to the position control mode. Invalidate the software
stroke limit to execute one-way feed.
Cd.141 Cd.142
Acceleration time at Deceleration time at
speed control mode speed control mode
0 20000 30000
12 - 12
Chapter 12 Expansion Control
The command speed to servo amplifier is stored
in " Md.122 Speed during command.
Cd.141
Acceleration time at
speed control mode
0 -10000 -20000
t
Cd.142
Deceleration time at
speed control mode
0