Mech Brk Control - ABB ACS355 User Manual

274 Actual signals and parameters
All parameters
No. Name/Value
4233 TRIM
SELECTION
SPEED/FREQ
TORQUE
43 MECH BRK
CONTROL
4301 BRAKE OPEN
DLY
0.00...2.50 s
4302 BRAKE OPEN
LVL
0.0...180.0%
4303 BRAKE
CLOSE LVL
0.0...100.0%
4304 FORCED
OPEN LVL
0.0 = NOT SEL
0.0...100.0%
4305 BRAKE MAGN
DELAY
Description
Selects whether the trimming is used for correcting the
speed or torque reference. See section
on page 129.
Speed reference trimming
Torque reference trimming (only for REF2 (%))
Control of a mechanical brake. See section
mechanical brake on page 157.
Defines the brake open delay (= the delay between the
internal open brake command and the release of the motor
speed control). The delay counter starts when the motor
current/torque/speed has risen to the level required at brake
release (parameter 4302 BRAKE OPEN LVL
FORCED OPEN LVL) and the motor has been magnetized.
Simultaneously with the start of the counter, the brake
function energizes the relay output controlling the brake and
the brake starts opening.
Delay time
Defines the motor starting torque/current at brake release.
After start the drive current/torque is frozen to the set value,
until the motor is magnetized.
Value in percent of the nominal torque T
or the nominal current I
The control mode is selected by parameter
CTRL MODE.
Defines the brake close speed. After stop the brake is
closed when drive speed falls below the set value.
Value in percent of the nominal speed (in vector control) or
the nominal frequency (in scalar control). The control mode
is selected by parameter
Defines the speed at brake release. Parameter setting
overrides parameter
start, the drive speed is frozen to the set value, until the
motor is magnetized.
The purpose of this parameter is to generate enough start
torque to prevent the motor rotating into the wrong direction
because of the motor load.
Value in percent of the maximum frequency (in scalar
control) or the maximum speed (in vector control). If
parameter value is set to zero, the function is disabled. The
control mode is selected by parameter
MODE.
Defines motor magnetizing time. After start drive
current/torque/speed is frozen to the value defined by
parameter 4302 BRAKE OPEN LVL
OPEN LVL for the set time.
Reference trimming
N
(in scalar control).
2N
9904 MOTOR CTRL
4302 BRAKE OPEN LVL
9904 MOTOR CTRL
or 4304 FORCED
Def/FbEq
SPEED/F
REQ
0
1
Control of a
0.20 s
or 4304
1 = 0.01 s
100%
(in vector control) 1 = 0.1%
9904 MOTOR
4.0%
1 = 0.1%
MODE.
0.0 =
setting. After NOT SEL
1 = 0.1%
0 = NOT
SEL