Torque Detection - YASKAWA E7U Programming Manual

Parameter
Parameter Name
No.
Digital Operator Display
Speed Agreement Detection Level
L4-01
Spd Agree Level
Speed Agreement Detection Width
L4-02
Spd Agree Width
Frequency Reference Loss
L4-05 Detection Selection
Ref Loss Sel
Frequency Reference Level at
L4-06 Loss Frequency
Fref at Floss
Number of Auto Restart Attempts
L5-01
Num of Restarts
Auto Restart Operation Selection
L5-02
Restart Sel
Maximum Restart Time After
L5-03 Fault
Max Restart Time
Torque Detection Selection 1
L6-01
Load Detection
Torque Detection Level 1
L6-02
Load Det Lvl
Torque Detection Time 1
L6-03
Loss Det Time
Table A.1
Parameter List (Continued
Description
Ref Detection
L4-01 and L4-02 are used in conjunction with the
multi-function outputs, (H2-01and H2-02) as a setpoint
and hysteresis for a contact closure.
Determines how the Drive will react when the fre-
quency reference is lost.
0: Stop (Disabled) - Drive will not run at the fre-
quency reference
1: Enabled @ % of PrevRef - Drive will run at a
percentage (L4-06) of the frequency reference level at
the time frequency reference was lost.
If Frequency Reference loss function is enabled
(L4-05=1) and Frequency Reference is lost, then the
Drive will run at reduced frequency reference deter-
mined by L4-06. New Fref=Fref at time of loss x L4-06.
Fault Restart
Determines the number of times the Drive will perform
an automatic restart.
Determines if the fault contact activates during an
automatic restart attempt.
0: No Flt Relay - fault contact will not activate during
an automatic restart.
1: Flt Relay Active - fault contact will activate during
an automatic restart.
If the restart fails (or is not attempted due to a
continuing fault condition, e.g. an OV fault) the Drive
waits L5-03 seconds before attempting another restart.

Torque Detection

Determines the Drive's response to an overtorque /
undertorque condition. Overtorque and Undertorque
are determined by the settings in parameters L6-02 and
L6-03.
0: Disabled
1: OL@SpdAgree - Alm (Overtorque Detection only
active during Speed Agree and Operation continues
after detection)
2: OL At RUN - Alm (Overtorque Detection is always
active and operation continues after detection)
3: OL@SpdAgree - Flt (Overtorque Detection only
active during Speed Agree and Drive output will shut
down on an OL3 fault.)
4: OL At RUN - Flt (Overtorque Detection is always
active and Drive output will shut down on an OL3
fault.)
5: LL@SpdAgree - Alm (Undertorque Detection is only
active during Speed Agree and operation
ues after detection.)
6: LL at RUN - Alm (Undertorque Detection is always
active and operation continues after detection.)
7: LL @ SpdAgree - Flt (Undertorque Detection only
active during Speed Agree and Drive output will shut
down on an OL3 fault.)
8: LL At RUN - Flt (Undertorque Detection is always
active and Drive output will shut down on an OL3
fault.)
Sets the overtorque/undertorque detection level as a
percentage of Drive rated current.
Sets the length of time an overtorque / undertorque
condition must exist before being recognized by the
Drive. OL3 is then displayed.
Parameters A - 21
)
Setting Factory
Range Setting
0.0 to 200.0 0.0Hz
0.0 to 20.0 2.0Hz
0 or 1 1
0 to 100.0% 80.0%
0 to 10 0
0 or 1 0
0.5 to 600.0 180.0sec
0 to 8 0
contin-
0 to 300 15%
0.0 to 10.0 10.0sec
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