Lenze 8400 motec - Manual (Page 506)

13 Application examples
13.3 Motor load test
506 Lenze · 8400 motec · Reference manual · DMS 4.1 EN · 08/2013 · TD05
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13.3 Motor load test
Task:
In order to verify a motor design, the motor is to be loaded by cyclic reversing in a long-term test.
Solution:
The GP function "Binary logic" (
L_DigitalLogic_1 ) serves to configure the logic function "NOT". This
inverts the output of the delay element ( L_DigitalDelay_1 ) and thus generates an alternating signal.
The alternating signal in turn is connected to the application input for change of direction of rota-
tion (bSetSpeedCcw) and causes an alternating direction of rotation of the motor.
[13-4] Basic signal flow
Example parameter setting:
Digital
Delay
Digital
Logic IN2
IN1 LA_NCtrl: bSetSpeedCcw
C00720/1
C00720/2
On delay
Off delay
LS_DigitalOutput: bRelay
C00820 Function
C00821/1 bIn1=0/bIn2=0
Parameter Info Setting Info
Assignment of the input/output terminals
C00621/1 LS_DigitalOutput:bRelay 220:
L_DigitalDelay_1
_bOut
For test purposes:
The relay is also triggered with the alter-
nating signal of the binary delay ele-
ment.
GP function "Binary logic"  L_DigitalLogic_1
C00820 L_DigitalLogic_1: Function 4: bOut =
f(truth table)
The truth table parameterised in C00821
is used.
C00821/1 L_DigitalLogic_1: bIn1=0/bIn2=0 1: True Truth table for logic "NOT" function.
C00701/28 L_DigitalLogic_1: bIn1 220:
L_DigitalDelay_1
_bOut
Input 1 is connected to the output of the
delay element.
C00701/29 L_DigitalLogic_1: bIn2 0: Not connected Input 2 is not required.
GP function "Binary delay element"  L_DigitalDelay_1
C00720/1 L_DigitalDelay_1: On delay 5 s Switch-on delay
C00720/2 L_DigitalDelay_1: Off delay 5 s Switch-off delay
C00701/23 L_DigitalDelay_1: bIn 240:
L_DigitalLogic_1
_bOut
Input value of the delay element is the re-
sult of the binary logic.
Control signals for application  TA "Actuating drive speed"
C00701/5 LA_NCtrl: bSetSpeedCcw 220:
L_DigitalDelay_1
_bOut
The direction of rotation is changed with
the alternating signal of the binary delay
element.