82 Standard programposi features
Brake chopper
A brake chopper can be used to handle the energy generated by a decelerating
motor. When the DC voltage rises high enough, the chopper connects the DC circuit
to an external brake resistor. The chopper operates on the pulse width modulation
principle.
The internal brake choppers of ACS880 drives start conducting when the DC link
voltage reaches 1.156 ×
U
DCmax
. 100% pulse width is reached at approximately 1.2 ×
U
DCmax
, depending on supply voltage range. See table under
(page
). (
U
DCmax
is the DC voltage corresponding to the maximum of the AC
supply voltage range.)
For information on external brake choppers, refer to their documentation.
Settings
See parameter
(page
) and parameter group
(page
).
Safety and protections
Emergency stop
The emergency stop signal is connected to the input selected by parameter
. An emergency stop can also be generated through fieldbus
(parameter
, bits 0…2).
The mode of the emergency stop is selected by parameter
. The following modes are available:
• Off1: Stop along the standard deceleration ramp defined for the particular
reference type in use
• Off2: Stop by coasting
• Off3: Stop by the emergency stop ramp defined by parameter
With Off1 or Off3 emergency stop modes, the ramp-down of the motor speed can be
supervised by parameters
.
Notes:
• For SIL 3 / PL e-level emergency stop functions, the drive can be fitted with a
TÜV-certified FSO-xx safety options module. The module can then be
incorporated into certified safety systems.
• The installer of the equipment is responsible for installing the emergency stop
devices and all additional devices needed for the emergency stop function to fulfill
Содержание ACS880 ESP
Страница 1: ...ABB industrial drives Firmware manual ACS880 PCP ESP control program ...
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Страница 28: ...28 PCP ESP control start up ...
Страница 30: ...30 Using the control panel ...
Страница 94: ...94 Standard programposi features ...
Страница 100: ...100 Default control connections ...
Страница 360: ...360 Parameters ...
Страница 362: ...362 Additional parameter data Fieldbus addresses Refer to the User s Manual of the fieldbus adapter ...
Страница 436: ...436 Fault tracing ...
Страница 486: ...486 Control chain diagrams ...
Страница 492: ...492 Appendix ESP with step up transformer and sine filter ...
Страница 494: ...Contact us www abb com drives www abb com drivespartners 3AXD50000016186 Rev B EN 2015 10 27 ...