Overtorque Detection - YASKAWA CR700 Technical Manual

3.10 Crane Application Setup Procedure
S5-01/S5-04 Settings
■
Detection
Setting
Value
Enabled Disabled
0 - x
1 x -
2 x -
3 x -
4 x -
5 x -
6 x -
*1 Pushing on the keypad will not reset an alarm.
Multi-Function Digital Output
■
The following table shows the ON/OFF conditions of the MFDO terminals.
H2-xx
Setting Value
22 Overload Detection (N.O.)
23 Weight Det N.C.

Overtorque Detection

◆
This function limits drive operation depending on how high the drive torque reference or the output current is in
order to provide mechanical protection to the crane. If the drive detects an overtorque situation, then it displays
oL3 [Overtorque Detection 1] or oL4 [Overtorque Detection 2] on the keypad. You can set 2 levels for overtorque
detection, and 2 types of action to take after detecting overtorque.
Note:
The overtorque detection function is disabled when the Run command source is set to the keypad.
Related Parameters
■
No. Name
S6-01 OverT Detect Operation Select 1
S6-04 OverT Detect Operation Select 2
S6-02 Overtorque Detection Level 1
S6-05 Overtorque Detection Level 2
S6-03 Overtorque Detection Time 1
S6-06 Overtorque Detection Time 2
S6-09 Torque Detection Filter Time
214
Conditions
During
Type
During Speed
Run Agree
ment
- -
- x
x -
Alarm
- x
x -
- x
Fault
(Triggers a fault relay
x -
output)
Name
If the drive detects overload based on the conditions set for Overload Detection 1 or 2, then this
digital output will switch ON.
The digital output will switch OFF when oL5 is cleared from the keypad display.
If the drive detects overload based on the conditions set for Overload Detection 1 or 2, then this
digital output will switch OFF.
The digital output will switch ON when oL5 is cleared from the keypad display.
Table 3.21 Overtorque Detection Parameters
Enables overtorque detection, and sets the conditions for detection as well as the operation to
perform after an overtorque is detected.
Sets the level to trigger an overtorque.
• V/f Control Mode
Sets the amount of torque that triggers overtorque detection as the motor rated current is 100%.
• OLV Control
Sets the amount of torque that triggers overtorque detection as the motor rated torque is 100%.
If the motor current and motor torque exceed the value set in S6-02 for longer than the time set in
this parameter, then Overtorque 1 will be detected.
If the motor current and motor torque exceed the value set in S6-05 for longer than the time set in
this parameter, then Overtorque 2 will be detected.
Sets the time constant for a primary filter to the torque reference or to the output current used to
detect overtorque.
Operation after Detection
- -
Acceleration prohibited
Ramps to stop according to C1-09
[Fast Stop Time]
Coast to Stop
Description
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
Drive Recovery
-
When the Run command is OFF and
the motor has stopped, the drive will
return to the state before the fault was
*1
triggered.
When the Run command is OFF and
the motor has stopped, the drive will
return to the state before the fault was
*1
triggered.
Push on the keypad or turn ON
the terminal set for "Fault Reset" to
reset the fault.
Description
Error Code
oL3
oL4
-
-
oL3
oL4
-