Omron VARISPEED L7 User Manual

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 Limiting the Motor Torque (Torque Limit Function)
This function allows limitation of motor shaft torque independently for each of the four quadrants. The torque
limit can be set as a fixed value using parameters or as a variable value using an analog input. The torque limit
function can be used with Open Loop Vector and Closed Loop Vector control only.
Related Parameters
* A setting value of 100% is equal to the motor rated torque.
Multi-function Output (H2-01 to H2-03)
Setting the Torque Limit Using Parameters
Using L7-01 to L7-04, four torque limits in the following directions can be set individually: Forward drive,
reverse drive, forward regenerative and reverse regenerative (see Fig 6.18)
Fig 6.18 Torque Limit Parameters
Using a Digital Output to Signalize Operation at the Torque Limit
If a multifunction output is set to this function (H2-01 to H2-03 is set to “30”), the output is switched ON
when the motor output torque reaches one of the torque limits.
Parameter No. Name
Factory Set-
ting
Change dur-
ing Opera-
tion
Control Methods
V/f
Open
Loop
Vector
Closed
Loop
Vector
Closed
Loop
Vector
(PM)
L7-01 Forward drive torque limit 300%* No - A A A
L7-02 Reverse drive torque limit 300%* No - A A A
L7-03 Forward regenerative torque limit 300%* No - A A A
L7-04 Reverse regenerative torque limit 300%* No - A A A
L7-06 Torque limit integral time constant 200 ms No - A - -
L7-07
Torque limit integral operation during accel./
decel. selection
0No-A--
Set
Value
Function
Control Methods
V/f
Open
Loop
Vector
Closed
Loop
Vector
Closed
Loop
Vector
(PM)
30 During torque limit No Yes Yes Yes
L7-01
Output Torque
Output Speed
L7-03
L7-02
L7-04
Forward
Drive
Reverse
Drive
Reverse
Regenerative
Forward
Regenerative

Omron VARISPEED L7 Specifications

General

Brand	Omron
Model	VARISPEED L7
Category	Inverter
Language	English