Specifications

YASKAWA Inverter Drive A1000 – Crane Software Application Manual
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• If E1-09 parameter value is lower than b2-01, then b2-01 is used as the frequency reference lower limit.
• Only when the speed reference has been under b2-01 or E1-09 for more than 100 ms will the internal Run
Command be seen as open. Until that time, the drive will operate with an output frequency of FRF (RRF) or FHF
(RHF), whichever is larger.
7.1.6 Brake Sequence Faults
When a brake sequence fault is triggered, the drive will interrupt output to the motor (baseblock), change the state of the
fault relay, and open the Brake Release Command BR relay in order to clamp the brake shut. In this section the
triggering conditions for each brake sequence fault are described, and possible causes and corrective action are
mentioned.
Fault Description
Detection
Time
Possible Cause / Corrective Action
Cause:
- Sequence error from the controller or external circuitry
SE1
The drive has received a FWD Run
Command and a REV Run command
simultaneously
S1-16
Corrective Action:
- Check controller settings and external circuitry
Cause:
- The motor is not connected properly.
- Brake release current IF (IR) and/or brake release torque TF (TR) is set too
high
SE2
The drive has received a Run
Command but brake release conditions
are not met before the time set in S1-17
S1-17
Corrective Action:
- Check motor connections
- Lower brake release current and/or brake release torque to a value
appropriate for the load
Cause:
- Sequence error in the external brake circuit
- Response time of the feedback signal from the external circuit is too slow
SE3
The drive has output a Brake Release
Command BR but did not receive a
Brake Release Check BX feedback
signal before the time set to S1-18
S1-18
Corrective Action:
- Check external brake circuitry
- Increase SE3 detection time or lower the response time for the feedback
signal
Cause:
- Bad connection or loose wiring between relay, contactor or brake.
SE4
The drive has received a Brake
Release Check BX feedback signal
without activating the Brake Release
Command BR output relay.
S1-19
Corrective Action:
- Check external brake circuitry and wiring.
• To deactivate detection of any of the sequence faults, set the detection time for the respective fault to zero.
• If the Brake Release Check BX signal is not assigned to a multi-function digital input, SE3 and SE4 will not be
detected.
7.2 Run Command Adjustments
The way the drive internally processes run commands that have been entered can be modified with this function. In this
section the parameters associated with this function are described in detail.
7.2.1 Run Command Adjustment Parameters (S2-)
S2-01 Run Command Minimum ON Time (FWD): Sets the minimum time that the drive will run when an external FWD
Run Command is given.
S2-02 Run Command Minimum ON Time (REV)
: Sets the minimum time that the drive will run when an external REV
Run Command is given.
No. Parameter Name Setting Range Default
S2-01
Run Command Minimum ON Time (FWD) 0.00 s
S2-02
Run Command Minimum ON Time (REV)
0.00 to 10.00 s
0.00 s