Specifications
YASKAWA Inverter Drive A1000 – Crane Software Application Manual
36
S1-03 Brake Delay Frequency (BF)
: Initial frequency to which the drive accelerates when a Run Command is entered.
Only after the BX signal is received and the Brake Delay Time BT (S1-04) has passed will the drive accelerate to its
normal frequency reference. This parameter is usually set up to 1.0 Hz above the motor rated slip frequency, except in
CLV control mode where it should be set to zero.
• If BF is set too low, current will be unable to flow through the motor at start and an SE2 sequence fault may
occur.
• If BF is set too high, then excessive current at start may cause an electrical shock
S1-04 Brake Delay Time (BT)
: Time during which the drive holds the output frequency at the BF level when the BX signal
is received before it accelerates to the primary frequency reference. This parameter should be set to the Brake Operation
Delay Time BDT minus the time it takes for the brake to produce the BX signal when the BR command is given, except
in CLV control mode where it should be set to zero.
No. Parameter Name Setting Range Default
S1-03
Brake Delay Frequency 0.0 to 400.0 Hz Determined by A1-02
S1-04
Brake Delay Time 0.00 to 10.00 s Determined by A1-02
S1-05 FWD Brake Release Current (IF)
: When a FWD Run Command is given, one of the conditions for the Brake
Release Command (BR) to be activated is that IOUT must surpass the value set in this parameter. In vector control
modes the typical value for this parameter is determined by
(
)
()
012
100032
−
⋅
−
E
E
In V/f control modes, this setting should be set to 100% if the FWD direction is the hoisting direction.
• If set too low, motor is likely to slip when starting to hoist the load
• If set too high, the brake is likely to slip before being released and an SE2 sequence fault will occur
S1-06 REV Brake Release Current (IR)
: When a REV Run Command is given, one of the conditions for the Brake
Release Command (BR) to be activated is that IOUT must surpass the value set in this parameter. In vector control
modes the typical value is determined by the same equation as IF. In V/f control modes, this setting should be set to 50%
if the REV direction is the lowering direction. The same consequences as in IF apply if this parameter is set too high or
too low.
No. Parameter Name Setting Range Default
S1-05
FWD Brake Release Current 50%
S1-06
REV Brake Release Current
0 to 200 %
30%
S1-07 FWD Brake Release Torque (TF)
: When a FWD Run Command is given, one of the conditions for the Brake
Release Command (BR) to be activated is that drive ITR must surpass the value set in this parameter. TF is only active
in vector control modes and should be set to 100% if the FWD direction is the hoisting direction.
• If set too low, motor is likely to slip when starting to hoist the load
• If set too high, the brake is likely to slip before being released and an SE2 sequence fault will occur
S1-08 REV Brake Release Torque (TR)
: When a REV Run Command is given, one of the conditions for the Brake
Release Command (BR) to be activated is that drive ITR must surpass the value set in this parameter. TR is only active
in vector control modes and should be set to 0% if the REV direction is the lowering direction. The same consequences
as in TF apply if this parameter is set too high or too low.
No. Parameter Name Setting Range Default
S1-07
FWD Brake Release Torque 100%
S1-08
REV Brake Release Torque
0 to 200 %
0%
S1-09 FWD Torque Compensation (TCF)
: Sets the vector control torque compensation amount in the FWD direction. In
CLV control mode it is normally set to zero. This parameter should be increased if the Brake Release Command BR is
slow/late, if slipping occurs at start, and if the brake is not released because the internal torque reference does not reach
the FWD Brake Release Torque TF before a sequence fault occurs. TCF should be decreased if the load experiences
jolting of jerking at start.
S1-10 REV Torque Compensation (TCR)
: Sets the vector control torque compensation amount in the REV direction. In
CLV control mode it is normally set to zero. This parameter should be increased if the Brake Release Command BR is
slow/late, if slipping occurs at start, and if the brake is not released because the internal torque reference does not reach
the REV Brake Release Torque TR before a sequence fault occurs. TCR should be decreased if the load experiences
jolting of jerking at start.