YASKAWA CR700, Техническое руководство, Страница: 204 / 886

3.10 Crane Application Setup Procedure
204 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
Note:
If the speed reference entered from terminal A1 slowly changes, then the following operation will be executed after the Brake release
command is switched OFF.
• For forward run, the drive operate at the speed reference from S1-01 [Brake Release Frequency(FWD)] and S1-12 [Brake Hold
Frequency (FWD)]
, whichever is larger, until the Run command is switched OFF.
• For reverse run, the drive operate at the speed reference from S1-02 [Brake Release Frequency(REV)] and S1-13 [Brake Hold
Frequency (REV)] , whichever is larger, until the Run command is switched OFF.
• Even after the brake is engaged, because the drive will continue to run the motor until the Run command is switched OFF, makes sure
that the speed reference input from terminal A1 drops to 0 within 100 ms before the output frequency reaches S1-12 , S1-13 . Failing to
make this setting can cause the brake to slip.
■
Sequence Fault Monitoring Function
If a brake sequence error is detected, then the drive will switch OFF the brake release command, perform
baseblock, and trigger a fault relay output. Refer to the parameters used to set up the detection time, and to the
chapter on Troubleshooting for details.
Table 3.14 Sequence Fault Table
Code Name Cause Solution
Parameters for
Detection Time
SE1 Brake Sequence Fault 1
(SE1)
A forward and a reverse command were input
simultaneously.
Examine the forward and reverse command sequence
circuit.
S1-16
SE2 Brake Sequence Fault 2
(SE2)
The motor is not connected and the current does not
flow. The break release command (BR) does not turn
ON.
Examine the motor circuit. S1-17
The brake release current and torque setting value is
too high.
Decrease the parameter setting values appropriately
for the load.
Brake grinding occurs and it does not reach the brake
release torque.
Examine the brake torque.
SE3 Brake Sequence Fault 3
(SE3)
Sequence Error of the Brake Circuit. Examine the sequence circuit of brake release check
signal (BX).
S1-18
The response (scan) of the Sequence circuit is slow.
Loose connection or disconnection of the relay,
electromagnetic contactor and brake.
Examine the relay, electromagnetic contactor and
brake.
SE4 Brake Sequence Fault 4
(SE4)
The break release check (BX) turns ON when the
break release command (BR) is OFF.
Examine the sequence circuit of brake release check
signal (BX).
S1-19
Loose connection or disconnection of the relay,
electromagnetic contactor and brake.
Examine the relays, electromagnetic contactor, and
brake, as well as the wiring.
Note:
The following settings will keep the drive from detecting a sequence error. The function for detecting sequence errors should usually be
enabled to ensure that the brake operates properly.
• If none of the MFDIs are set to the Brake release check signal, then the drive will detect an SE3 or SE4 error.
• No sequence error detection will occur if the detection times in parameters S1-16 to S1-19 are set to 0.00.
◆
Adjusting the Run Command
■
Run Command Minimum On Time Function
If the input time for the Run command is shorter than the settings in
S2-01 [Run Cmd Minimum On Time (FWD)]
,
S2-02 [Run Cmd Minimum On Time (REV)] , then the drive will hold the Run command only for the time set in
S2-01 and S2-02 .
Related Parameters
No. Name Adjustment Method
S2-01 Run Cmd Minimum On Time (FWD) Increase this value if the drive control and brake operation do not operate as expected during extremely
quick inching operation and the load slips.
S2-02 Run Cmd Minimum On Time (REV)
Increase the value if movement is unstable during extremely quick inching operation.
Description of Operation
The following is a description of the operation performed when
S2-01 ≠ 0
,
S2-02 ≠ 0
.