Vacon alfiff28, Руководство пользователя

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20 • vacon description of parameters
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In normal operation the brake will be closed when frequency falls below the Frequency close limit
(
P2.3.2.1 ) AND when the Run Request signal is switched OFF. If the Frequency close limit signal is
not needed for the closing logic it can be set to zero. After the conditions are true there is a brake
close delay (
P2.3.2.2 ) after which the brake will be closed.
Opening Brake Parameters (M2 -> G2.3.1)
Please note that there are limitations parameters for both Forward (FWD) and Reverse (REV)
direction.
Different values for FWD and REV can be set when application requires.
For example when counter weight is not used (e.g. Mechanical Brake Control application)
2.3.1.1 Current Limit FWD
Parameter defines the actual current limit that has to be exceeded for a brake release.
If set to zero this condition is excluded. The value is updated always when the nominal
current of the motor (
parameter 2.1.4 ) is set (see Figure 3).
2.3.1.2 Current Limit REV
Parameter defines the actual current limit that has to be exceeded for a brake release.
If set to zero this condition is excluded. The value is updated always when the nominal
current of the motor (
parameter 2.1.4 ) is set (see Figure 3).
2.3.1.3 Torque limit FWD
Parameter defines the actual torque limit that has to be exceeded for a brake release.
If set to zero this condition is excluded.
100 % corresponds to the calculated nominal torque of the motor (see Figure 3).
2.3.1.4 Torque limit REV
Parameter defines the actual torque limit that has to be exceeded for a brake release.
If set to zero this condition is excluded.
100 % corresponds to the calculated nominal torque of the motor (see Figure 3).
2.3.1.5 Frequency limit FWD
Parameter defines the actual frequency limit that has to be exceeded for brake
release. If set to zero this condition is excluded (see Figure 3).
2.3.1.6 Frequency limit REV
Parameter defines the actual frequency limit that has to be exceeded for brake
release. If set to zero this condition is excluded (see Figure 3).
2.3.1.7 Brake open delay
Delay which starts when the opening conditions (see parameters 2.3.1.1-2.3.1.6 ) are
TRUE (see Figure 3).