Programming and Parameters 3-43
PowerFlex 40 Adjustable Frequency AC Drive FRN 1.xx - 7.xx User Manual
Publication 22B-UM001I-EN-E
Advanced Program Group (continued)
A161 [EM Brk On Delay] Related Parameter(s): P037
Sets the time the drive remains at minimum frequency before the relay or an opto output is
de-energizing and the drive stops.
The relay or opto output is typically connected to a user-supplied electromechanical brake coil relay.
Set P037
[Stop Mode] to 8 “Ramp+EM B,CF” or 9 “Ramp+EM Brk” to enable the electromechanical
brake option.
Set A055
[Relay Out Sel], A058 or A061 [Opto Outx Sel] to 22 “EM Brk Cntrl” to control brake
operation.
Values Default: 2.00 Secs
Min/Max: 0.01/10.00 Secs
Display: 0.01 Secs
A162 [MOP Reset Sel] Related Parameter(s): A069
Set the drive to save the current MOP reference command.
Options 0 “Zero MOP Ref” This option clamps A069
[Internal Freq] at 0.0 Hz when the
drive is not running.
1 “Save MOP Ref”
(Default)
Reference is saved in A069
[Internal Freq].
A163 [DB Threshold] Related Parameter(s): P037, A080, A081, A082
Sets the DC bus Voltage Threshold for Dynamic Brake operation. If the DC bus voltage falls below the
value set in this parameter, the Dynamic Brake will not turn on. Lower values will make the Dynamic
Braking function more responsive but may result in nuisance Dynamic Brake activation.
Values Default 100.0%
Min/Max: 0.0/110.0%
Display: 0.0%
ATTENTION: Equipment damage may result if this parameter is set a
value that causes the dynamic braking resistor to dissipate excessive power.
Parameter settings less than 100% should be carefully evaluated to ensure
that the dynamic brake resistor’s wattage rating is not exceeded. In general,
values less than 90% are not needed. This parameter’s setting is especially
important if parameter A082 [DB Resistor Sel] is set to 2 “No Protection”.
22B-UM001.book Page 43 Tuesday, May 30, 2017 5:22 PM
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