(H) Protective function parameter
354
PARAMETERS
To further prevent a trip (Pr.154)
• When Pr.154 Voltage reduction selection during stall prevention operation = "0, 10", the output voltage is reduced. By
making this setting, an overcurrent trip becomes less likely to occur. Use this setting when torque reduction does not pose
a problem. (Under V/F control, the output voltage is reduced only during the stall prevention operation is activated.)
•Set Pr.154 = "10, 11" when the overvoltage protective function (E.OV[ ]) activates during stall prevention operation in an
application with large load inertia. Note that turning OFF the start signal (STF/STR) or varying the frequency command
during stall prevention operation may delay the acceleration/deceleration start.
Pr.22 torque limit level page 185
Pr.73 Analog input selection page 406
Pr.178 to Pr.189 (Input terminal function selection) page 430
Pr.190 to Pr.196 (output terminal function selection) page 384
Pr.858 Terminal 4 function assignment, Pr.868 Terminal 1 function assignment page 410
Pr.154 E.OC[ ] countermeasure E.OV[ ] countermeasure
0Effective
1 (initial value)
10 Effective Effective
11 Effective
Caution
Do not set the stall prevention operation current too low.
Doing so will reduce the generated torque.
Be sure to perform a test run.
Stall prevention operation during acceleration may extend the acceleration time.
Stall prevention operation during constant-speed operation may cause sudden speed changes.
Stall prevention operation during deceleration may extend the deceleration time.
To Next Page
Loading...
