Group 20: Limits
This group defines minimum and maximum limits to follow in driving the motor – speed, frequency, current, torque, etc.
Table 32: Group 20: Limits
Code Description
Range
Resolution
Default
S
2003 MAX CURRENT
0 .0… 1 .1 * I
2N
0 .1 A
1 .1 * I
2N
Defines the maximum output current (A) supplied by the drive to the motor.
2006 UNDERVOLT CTRL
0…2
1
1
Sets the DC undervoltage controller on or off . When on:
• If the DC bus voltage drops due to loss of input power, the undervoltage controller decreases the motor speed in order to keep
the DC bus voltage above the lower
• When the motor speed decreases, the inertia of the load causes regeneration back into the drive, keeping the DC bus charged, and
preventing an undervoltage trip .
• The DC undervoltage controller increases power loss ride-through on systems with a high inertia, such as a centrifuge or a fan .
0 = DISABLE – Disables controller .
1 = ENABLE (TIME) – Enables controller with 500 ms time limit for operation .
2 = ENABLE – Enables controlled without maximum time limit for operation .
2007 MINIMUM FREQ
-500 .0…
500 .0 Hz
0 .1 Hz
0 .0 Hz
Defines the minimum limit for the drive output frequency.
• A positive or zero minimum speed frequency defines two ranges, one positive and one negative.
• A negative minimum speed frequency defines one speed range. See figure.
Note!
Keep MINIMUM FREQ ≤ MAXIMUM FREQ.
2008 MAXIMUM FREQ
0 .0…500 .0
Hz
0 .1 Hz
60 .0 Hz (US)
Defines the maximum limit for the drive output frequency.
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Summary of Contents for ACS320
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