YASKAWA CR700, Техническое руководство, Страница: 206 / 886

3.10 Crane Application Setup Procedure
206 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
By using S2-03 [Run Cmd Delay Timer (REV/FWD)] , it is possible to delay the hoisting operation immediately
after lowering a load. If the Forward run command is switched OFF → ON → OFF while the timer is operating,
the Forward run command will not be accepted during that time.
If the time to enter the Run command in order to hoist the load after lowering is shorter than the time set in
S2-03 ,
then there will be a delay before beginning the hoist operation. The following calculation is made and set in S2-03
as the target value.
Note:
If the current level is not too high even if hoisting the load immediately after lowering it, then this setting is not necessary.
◆
Impact Stop Function
For applications such as transport conveyor lines, entering a Stop command while a terminal set to H1-xx = 35
[MFDI Function Selection = Impact Stop Enable] is ON will stop operation when the torque reference or output
current is above the base value, and if the drive detects that the transport cart has bumped into something. This
allows for simple positioning (Impact Stop).
This function is enabled only when
b1-03 = 0 [Stopping Method Selection = Ramp to Stop] .
Note:
If the load is such that the wheels continue to spin when the transport cart bumps into something, then the Impact Stop function should
not be used. Even when the transport cart bumps into something, the motor output axle does not lock up, so because the torque reference
or the output current does not rise, Impact Stop is not activated.
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Related Parameters
Table 3.15 Parameters for Impact Stop
No. Name Description
S3-01 Impact Stop Creep Frequency Set this value higher than S1-14 [Slip Prevention Frequency] .
S3-02 Impact Stop Creep Time
Usually set to 10 s. If the drive detects that the torque reference or output current is above the base
value even though the Stop command has been entered, then consider how to protect the load, and
change the setting accordingly because the motor will still continue to rotate for the time set in
S3-02 and at the speed set in S3-01.
S3-03 Impact Stop Detect Torque (FWD)
Set a value to this parameter that is higher than the amount of current while running at the speed
set in
S3-01
. This value is set as a percentage of the motor rated current (usually set to 100%).
• If
S3-03/S3-04
are set too low, then the motor may stop before the transport cart actually hits
anything.
• If S3-03/S3-04 are set too high, then the motor will continue to rotate at the speed set in S3-01
for the time set in
S3-02
.
S3-04 Impact Stop Detect Torque (REV)
S3-05 Impact Stop Detection Time
Usually set between 0.2 s and 0.3 s. If S3-05 is set too low, then the motor may stop before the
transport cart actually hits anything.
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Multi-Funciton Digital Input
H1-xx
Setting Value
Name Description
35 Impact Stop Command
The Impact Stop command is activated when the terminal switches ON.