YASKAWA TM.iQp.02 iQpump Drive Programming Manual 107
◆ L6 Torque Detection
■ L6-01 Torque Detection Selection 1
■ L6-02 Torque Detection Level 1
Setting Range: 0 to 300% of the iQpump drive rated output current
Factory Default: 15% of the iQpump drive rated output current
■ L6-03 Torque Detection Time 1
Setting Range: 0.0 to 10.0 sec
Factory Default: 10.0 sec
The iQpump drive can be programmed to indicate when either an overtorque or an undertorque conditions exist. A digital output must be
programmed for “Torque Detection,” (H2-01/H2-02 = “B: Trq Det 1 N.O.” or “17: Trq Det 1 N.C.). A warning of an overtorque
condition can indicate a jam and an undertorque condition can indicate a broken belt, no water in a pump, or other loss of load.
To configure Torque Detection requires the following decisions:
1. Do you wish to check for an overtorque condition or an undertorque condition?
2. Do you wish to check for the torque condition whenever the drive is running or only at speed agree? Nuisance detection during
acceleration, when variable torques are normally required, can be avoided.
3. Do you want the drive to fault if the torque condition is detected or only alarm and continue operation?
The following table can help choose the proper setting for Torque Detection Selection 1 to get the wanted results.
Table 28 L6-01 Setting Choices
After selecting the proper detection scheme the Torque Detection Level (L6-02) must be specified. If the current level read by the output
current transformers rises above (overtorque) or drops below (undertorque) this level, and remains there for at least the Torque Detection
Time (L6-03), then the Torque Detection Function will change the state of any digital output configured for Torque Detection (H2-01/
H2-02 = “B: Trq Det 1 N.O.,” or “17: Trq Det 1 N.C.”).
Setting Description
0 Disabled (
factory default)
1 OL@SpdAgree - Alm
2OL At Run -Alm
3 OL@SpdAgree - Flt
4OL At Run - Flt
5 UL@SpdAgree - Alm
6UL at Run - Alm
7 UL@SpdAgree - Flt
8UL At Run - Flt
L6-01
Setting
Overtorque Undertorque Fault Alarm Always Detected
Only Detected @
Spd Agree
0 Torque Detection Disabled
1X X X
2X XX
3X X X
4XXX
5*XXX
6XXX
7X X
8X X
*Suggested settings for Loss of Load indication
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