Rockwell Automation Publication 22C-UM001J-EN-E - January 2017 91
Programming and Parameters Chapter 3
A176 [DC Brake Time] Related Parameter(s): P037
, A177
Sets the length of time that DC brake current is “injected” into the motor when P037
[Stop Mode] is set to either 4 “Ramp” or 6 “DC Brake”. Refer to parameter A177 [DC Brake Level].
Values Default: 0.0 Secs
Min/Max: 0.0/99.9 Secs (A setting of 99.9 = Continuous)
Display: 0.1 Secs
A177 [DC Brake Level] Related Parameter(s): P037, T051...T054, A176, A178
Defines the maximum DC brake current, in amps, applied to the motor.
Values Default: Drive Rated Amps × 0.05
Min/Max: 0.0/(Drive Rated Amps × 1.5)
Display: 0.1 Amps
DC Injection Brakin
Mod
olts/S
eed
Volta
e
Tim
Sto
Comman
S
ee
DC Brake Level
DC Brake Time
olts/S
eed
Ram
-to-Sto
Mod
Tim
Sto
Comman
DC Brake Level
DC Brake Time
ATTENTION: If a hazard of injury due to movement of equipment or material exists, an auxiliary mechanical braking device must be used.
ATTENTION: This feature should not be used with synchronous or permanent magnet motors. Motors may be demagnetized during braking.
A178 [DC Brk Time@Strt] Related Parameter(s): P037, A177
Sets the length of time that DC brake current is “injected” into the motor after a valid start command is received. Parameter A177 [DC Brake Level] controls the level of braking
current used.
Values Default: 0.0 Secs
Min/Max: 0.0/99.9 Secs (A setting of 99.9 = Continuous)
Display: 0.1 Secs
Volts/Speed
Time
Start Command
[DC Brake Level]
[DC Brk Time@Strt]
Voltage
Speed
A179 [Current Limit 1] Related Parameter(s): P033
Maximum output current allowed before current limiting occurs.
Values Default: Drive Rated Amps × 1.1
Min/Max: 0.0/(Drive Rated Amps × 1.5)
Display: 0.1 Amps
A180 [Current Limit 2] Related Parameter(s): P033
Maximum output current allowed before current limiting occurs.
Values Default: Drive Rated Amps × 1.1
Min/Max: 0.0/(Drive Rated Amps × 1.5)
Display: 0.1 Amps
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