BENSHAW RediStart EXEXMVRMX3 Series, Руководство пользователя

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If the motor stops rotating before the decel time expires, decrease the Decel Time (CFN 18) parameter. If the
motor is still rotating when the decel time expires, increase the Decel Time (CFN 18) parameter.
A typical decel time is 20 to 40 seconds.
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NOTE:
Depending on the motor load and the Decel parameter settings, the motor may or may not be fully
stopped at the end of the deceleration time.
Refer to section 7.4, Deceleration Control on page 131.
See Also
Stop Mode (CFN 15) on page 70.
Decel Begin Level (CFN 16) on page 70.
Decel End Level (CFN 17) on page 71.
Controlled Fault Stop (PFN 25) on page 85.
Theory of Operation section 7.4, Deceleration Control on page 131.
Decel Ramp Profile CFN 19
LCD Display
Range
Linear, Squared, S-Curve
(Default: Linear)
Description See Accel Prof (CFN 10) on page 67 for details.
See Also Stop Mode (CFN 15) on page 70.
DC Brake Level CFN 20
LCD Display
Range 10 – 100 % of available brake torque (Default: 25%)
Description When the Stop Mode (CFN 15) is set to "DC brake", the DC Brake Level parameter sets the level of DC
current applied to the motor during braking. The desired brake level is determined by the combination of the
system inertia, system friction, and the desired braking time. If the motor is braking too fast the level should
be reduced. If the motor is not braking fast enough the level should be increased. Refer to Nema MG1, Parts
12 and 20 for maximum load inertias. A PTC Thermistor or RTD MUST be installed to protect the motor.
DC Brake Function Programming Steps:
1. The DC Brake function may be enabled by setting the Stop Mode (CFN 15) parameter to "DC Brake".
2. Once this function is enabled, a relay output configuration (I/O 10 - 15) must be used to control the DC
brake contactor or 7th SCR gate drive card during braking. It is recommended to use Relay R3 - (I/O12)
because it is a higher rated relay.
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NOTE:
Standard duty braking
- For load inertias less than 6 x motor inertia
Heavy duty braking
- For NEMA MG1 parts 12 and 20 maximum load inertias
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NOTE:
When DC injection braking is utilized, discretion must be used when setting up the DC Brake
Level. Motor heating during DC braking is similar to motor heating during starting. Even though the Motor
OL is active (if not set to "Off") during DC injection braking, excessive motor heating could still result if the
load inertia is large or the brake level is set too high. Caution must be used to assure that the motor has the
thermal capacity to handle braking the desired load in the desired period of time without excessive heating.
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NOTE: Consult motor manufacturer for high inertia applications.
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6 - PARAMETER DESCRIPTION
CFN: Decel Prof
19
Linear
CFN: Brake Level
20
25 %