Encoder - ABB ACS355 series User Manual

286 Actual signals and parameters
All parameters
No. Name/Value
4304 FORCED
OPEN LVL
0.0 = NOT SEL
0.0...100.0%
4305 BRAKE MAGN
DELAY
0 = NOT SEL
0...10000 ms
4306 RUNTIME
FREQ LVL
0.0 = NOT SEL
0.0...100.0%
4307 BRK OPEN
LVL SEL
PAR 4302
MEMORY

50 ENCODER

5001 PULSE NR
32...16384 ppr Pulse number in pulses per round (ppr)
Description
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 as a percentage 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.
magnetizing time. If parameter value is set to zero, the
function is disabled.
Defines the brake close speed. When frequency falls below
the set level during run, the brake is closed. The brake is re-
opened when the requirements set by parameters
4301...4305 are met.
Value as a percentage 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.
Selects the torque (in vector control) or current (in scalar
control) applied at brake release.
Value of parameter 4302 BRAKE OPEN LVL
Torque value (in vector control) or current value (in scalar
control) saved in parameter
used.
Useful in applications where initial torque is needed to
prevent unintended movement when the mechanical brake
is released.
Encoder connection.
For more information, see MTAC-01 pulse encoder interface
module user's manual (3AFE68591091 [English]).
States the number of encoder pulses per one revolution.
4302 BRAKE OPEN LVL
9904 MOTOR CTRL
or 4304 FORCED
9904 MOTOR CTRL
0179 BRAKE TORQ MEM
Def/FbEq
0.0 =
setting. After NOT SEL
1 = 0.1%
0 = NOT
SEL
1 = 1 ms
0.0 =
NOT SEL
1 = 0.1%
PAR 4302
used. 1
2
1024 ppr
1 = 1 ppr