YASKAWA GA800

12.9 L: Protection Functions
990 YASKAWA SIEPC71061737D GA800 Drive Technical Reference
Table 12.70 Overtorque/Undertorque Detection Parameters
Configuration Parameter Overtorque/Undertorque Detection 1 Overtorque/Undertorque Detection 2
MFDO Function Select
• Terminal M1-M2
• Terminal M3-M4
• Terminal M5-M6
H2-01, H2-02, and H2-03 = B
N.O.: Activated when detected
H2-01, H2-02, and H2-03 = 18
N.O.: Activated when detected
H2-01, H2-02, and H2-03 = 17
N.C.: Deactivated when detected
H2-01, H2-02, and H2-03 = 19
N.C.: Deactivated when detected
Detection conditions and selection of operation after
detection
L6-01 L6-04
Detection Level L6-02 L6-05
Analog Input Terminal
*1
H3-xx = 7
-
Detection Time L6-03 L6-06
*1 You can also use an analog input terminal to supply the torque detection level. To enable this function, set H3-xx = 7 [MFAI Function
Selection = Overtorque/Undertorque DetectLvl]. If you set L6-02 and H3-xx = 7, the analog input is most important and the drive
disables L6-02.
You cannot use Overtorque/Undertorque Detection 2 to set the detection level for the analog input terminals.
Note:
The drive sets the Overtorque/Undertorque detection level in these conditions:
• V/f, CL-V/f, OLV/PM: Current level (drive rated current = 100%)
• OLV, CLV, AOLV, AOLV/PM, CLV/PM, EZOLV: Motor torque (Motor rated torque = 100%)
• L6-08 ≠ 0 [Mechanical Fatigue Detect Select ≠ Disabled]: Current level (drive rated output current = 100%)
■ Time Chart for Detection of Overtorque/Undertorque
Overtorque Detection Time Chart
When you use Overtorque/Undertorque Detection 1, the drive detects overtorque if the motor current or motor torque
is at the detection level set in L6-02 [Torque Detection Level 1] for the time set in L6-03 [Torque Detection Time 1].
Parameter L6-01 [Torque Detection Selection 1] sets the operation after detection.
When you use Overtorque/Undertorque Detection 2, set L6-04 [Torque Detection Selection 2], L6-05 [Torque
Detection Level 2], and L6-06 [Torque Detection Time 2].
Use H2-01 to H2-03 [MFDO Function Select] to set the terminal that outputs the alarm.
Figure 12.139 Overtorque Detection Time Chart
Note:
The drive applies a hysteresis of approximately 10% of the drive rated output current or the motor rated torque to the overtorque/undertorque
detection function.
Undertorque Detection Time Chart
When you use Overtorque/Undertorque Detection 1, the drive detects undertorque if the motor current or motor
torque is less than or equal to the detection level set in L6-02 for the time set in L6-03. Parameter L6-01 sets the
operation after detection.
When you use Overtorque/Undertorque Detection 2, set the operation in L6-04, L6-05, and L6-06.
Use H2-01 to H2-03 [MFDO Function Select] to set the terminal that outputs the alarm.