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Torque control operation
CONTROL
4
(1) When Pr. 807 = 0
2)Speed restriction on multi-speeds
The speed restriction command can also be set for the external signals (RH, RM, RL).
(The terminals are factory-set as follows. DI1 = RH, DI2 = RM, DI3 = RL)
(2) For Pr. 807="1 or 2", refer to the Instruction Manual (detailed).
4.2.7 Optimum speed estimation and torque control accuracy improvement
To eliminate the temperature drift of torque under torque control, change the Pr. 95 "online auto tuning" setting to
"2". (Refer to page 46.)
For torque control, easy gain tuning has no effect.
When an unfavorable phenomenon such as torque pulsation occurs or when you want to exhibit the best
performance according to the machine, refer to the Instruction Manual (detailed) to perform a manual gain
adjustment (Pr.824 to Pr.827).
The speed command value during speed restriction
acts as a speed restriction level. At this time,
according to the acceleration/deceleration time set
in Pr. 7 "acceleration time" and Pr. 8 "deceleration
time", the restriction level is increased from 0r/min
upon start, and when the start signal turns off, the
speed restriction level is decreased from the then
speed restriction level to the DC injection brake
operation speed in Pr. 10 to a stop. The speed
restriction level at this time is shown below.
REMARKS
• Set Pr. 73 "speed setting signal" to change between the main speed and override of terminal 2.
( Refer to the Instruction Manual (detailed).)
• If the above speed restriction command is greater than Pr. 1 "maximum speed", the speed restriction value is regarded as
the Pr. 1 "maximum speed" value. If the speed restriction command is smaller than Pr. 2 "minimum speed", the speed
restriction value is regarded as the Pr. 2 "minimum speed". Similarly when the speed restriction command is smaller than Pr.
13 "starting speed", the speed restriction value is 0r/min.
• Set the speed restriction of terminal 1 using Pr. 868 "No. 1 terminal function selection".
( Refer to the Instruction Manual (detailed).)
REMARKS
The RH, RM and RL signals are assigned to terminals DI1 to DI4 using Pr. 180 to Pr. 183 and Pr. 187 (input terminal function
selection).
CAUTION
When speed restriction is to be made using the analog command (terminal 2), turn off the external sig-
nals (RH, RM, RL). If any of external signals (RH, RM, RL) is on, multi-speed restrictions are made valid.
REMARKS
• Changing the terminal assignment in Pr. 180 to Pr. 183 and Pr. 187 may affect the other functions. Make setting after check-
ing the functions of the corresponding terminals.
• If the value set in Pr. 187 is other than "9999", the external command cannot be used to perform reverse rotation operation.
To start reverse rotation, set "9999" (factory setting) in Pr. 187 to make the STR signal of terminal STR valid.
• When the above speed restriction command is greater than the Pr. 1 "maximum speed" value, the speed restriction value is
the Pr. 1 "maximum speed" value, and when the speed restriction command is less than the Pr. 2 "minimum speed" value,
the speed restriction value is the Pr. 2 "minimum speed" value. When the speed restriction command is less than the Pr. 13
"starting speed" value, the speed restriction value is 0r/min.
• When external speed restriction is to be made using analog, calibrate the No. 2 (No.1) terminal. Refer to Pr. 902 "speed
setting No. 2 bias" and Pr. 903 "speed setting No. 2 gain". Refer to Pr. 917 "No.1 terminal bias" and Pr. 918 "No.1 terminal
gain" for the No.1 terminal. (Refer to page 47.)
Pr. 8
Pr. 7
Torque
controllable range
S
peed setting acts as
s
peed restriction level in
b
oth forward rotation and
r
everse rotation.
Start signal
Speed restriction operation
1)External analog speed restriction (terminal 1, 2)
The analog signal (0 to +10V (±10V)) input to terminal 2 (or terminal 1) is
used to give a speed restriction command.
10E (+10V)
2 (0 to +10V)
5 (Analog common)