Overtorque Detection - YASKAWA CIPR-CR70A Series Technical Manual

*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
OverT Detect Operation Select
S6-01
1
OverT Detect Operation Select
S6-04
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
S6-01 and S6-04 Settings
Detection
Setting
Ena Disa During
Value
bled bled Run
0 - x
1 x -
2 x -
YASKAWA ELECTRIC SIEP C710617 19A YASKAWA AC Drive CR700 Technical Manual
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.
Conditions
During
Type
speed
agree
ment
- - -
- x
Alarm
x -
3 Startup Procedure and Test Run
Description
Description
Operation after Detection
-
When the Run command is
OFF and the motor has
Alarm Only stopped, the drive will return
to the state before the fault
was triggered.
Error Code
oL3
oL4
-
-
oL3
oL4
-
Drive Recovery
-
*1
191