Lenze ECSCx Axis cold plate - Manual (Page 81)

Safety instructions
Thermal motor monitoring
Forced ventilated or naturally ventilated motors
2
l
81 EDKCSCX064 DE/EN/FR 4.0
2.2.1 Forced ventilated or naturally ventilated motors
Parameter setting
The following codes can be set for I
2 x t monitoring:
Code Meaning Value range Lenze setting
C0066 Display of the I 2 x t load of the motor 0 ... 250 % −
C0120 Threshold: Triggering of error "OC6" 0 ... 120 % 0 %
C0127 Threshold: Triggering of error "OC8" 0 ... 120 % 0 %
C0128 Thermal motor time constant 0.1 ... 50.0 min 5.0 min
C0606 Response to error "OC8" TRIP, warning, off Warning
Calculate release time and I 2 x t load
Formula for release time Information
t + * ( t ) ln
ȧȧ
ȡ
Ȣ
1 * z ) 1
ǒ
IMot
IN
Ǔ
2
100
ȧȧ
ȣ
Ȥ
I
Mot
Actual motor current (C0054)
I r Rated motor current (C0088)
t Thermal motor time constant
(C0128)
z Threshold value in C0120 (OC6) or
C0127 (OC8)
Formulae for I 2 x t load Information
L(t) +
ǒ
I
Mot
I
N
Ǔ
2
100%
ǒ
1 * e
*t
t
Ǔ
L(t) Chronological sequence of the
I
2 x t load of the motor
(Display: C0066)
I
Mot
Actual motor current (C0054)
Ir Rated motor current (C0088)
t Thermal motor time constant
(C0128)
If the controller is inhibited, the I 2 x t load is reduced:
L(t) + L
Start
e * tt
Ǹ
L
Start
I 2 x t load before controller inhibit
If an error is triggered, the value
corresponds to the threshold
value set in C0120 (OC6) or C0127
(OC8).