Instruction manual

36
Speed control operation
(2) Second torque limit level
(3) Torque limits during acceleration and deceleration
You can set torque limits during acceleration and deceleration individually.
The following chart shows torque limits according to the settings of Pr. 816 "acceleration torque limit level" and Pr.
817 "deceleration torque limit level".
(4) Setting increments switchover of the torque limit level (Pr. 811)
• By setting "10, 11" in Pr. 811 "set resolution switchover", the setting increments of Pr. 22 "torque limit level" and
Pr. 812 to Pr. 817 (torque limit level) can be switched to 0.01%.
z When the TL signal is on, the Pr. 815 value is a
torque limit value regardless of the setting in Pr. 810.
Related parameters
TL signal terminal assignment ⇒ Set "26" in any of Pr. 180 to Pr. 183 and Pr. 187 (input terminal function selection). (Refer to page 65)
REMARKS
• When an analog signal is used to make external torque limit, refer to page 51 for calibration of the terminal 3 (Pr. 904 "torque
command terminal 3 bias" and Pr. 905 "torque command terminal 3 gain").
• When an analog signal is used to make regenerative torque limit from the terminal 1, perform calibration of the
terminal 1. (Pr. 919 "terminal 1 bias (torque/magnetic flux)", Pr. 920 "terminal 1 gain (torque/magnetic flux)") Refer to page
51.
REMARKS
• The internal resolution of the torque limit is 0.024% (100/2
12
) and the fraction less than the resolution is rounded off.
• When the torque limit setting increments have been changed (0.1%
Ù0.01%), reset is necessary because the settings of Pr.
22 and Pr. 812 to Pr. 817 are multiplied by 1/10 (ten times).
For example, when 10 (0.01%) set in Pr. 811 is changed to 1 (0.1%) with Pr. 22 = 150.00%,
Pr. 22 = 1500.0% and the maximum torque is 400%.
• Refer to the Instruction Manual (detailed) for switchover of speed setting increments.
Pr. 815
quad 1
quad 2
Reverse rotation
Forward rotation
Torque limit
Speed
+-
Reverse
driving
Forward
driving
Reverse
regeneration
Forward
regeneration
quad 4
quad 3
Pr. 815 Pr. 815
Pr. 815
1500
r/min
1500
r/min
After the state where difference
between the set Speed and
running Speed is within
± 60r/min has persisted for 1s,
torque limit level during
acceleration/ deceleration
(Pr. 816 or Pr. 817) shifts to
torque limit level during
constant speed (Pr. 22).
Acceleration
Constant speed
Deceleration
Preset
Speed
Speed
Time
Torque limit level
1s
Pr. 816
"acceleration torque limit level"
Pr. 22
"torque limit level"
Pr. 817
"deceleration torque limit level"