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M’Ax User Guide 105
Issue Number: 4
Example
1. Set 4.53 Symmetrical current limit after motor thermal-overload
alarm at
200 (the largest of the symmetrical current limit values).
2. Set
4.54 Thermal-overload time to trip at 12 (process cycle time,
rounded-up to nearest integer).
3. Calculate the following:
4. Calculate the following:
5. Calculate the following:
6. Enter the calculated value into
4.52.
7. Perform the following, as appropriate:
Version _AN
Initiate the save operation by setting parameter XX.00 at 1000.
Execute the operation by performing either of the following:
• While the display is in Edit mode, press at the same time:
•Setparameter
10.38 at 100 (via serial communications)
Version _SL
Version _AN
(if required)
Ensure the Drive is disabled by checking that the
Hardware enable
contact is open or that parameter 6.15 is set at 0, then perform either
of the following:
• Initiate thestore operation by setting parameter
0.50 at 2 (Prog).
Execute the operation by setting parameter
10.38 at 100.
Set
11.67 Flash update enable at 1.
Parameter Value
4.15
Motor – thermal time-constant 89
4.07 Symmetrical current limit Kc1 150
4.24 Symmetrical current limit Kc2 200
4.28 Symmetrical current limit Kc3 175
Process cycle time 11.5s
Gain sequencing using all three PID-gains buffers
t
c
4.15[]– In 1
2
105
2
4.53[]
-------------------
–
èø
ç÷
æö
×=
t
c
89– In 1
2
105
2
200
------------
–
èø
ç÷
æö
× 28.7 s()==
t
D
t
C
4.54[]– 28.7 12– 16.7 s()===
4.52[]4.53[]1e
t–
D
4.15[]⁄
–×=
4.52[]200[]1e
16.7–()89⁄
–× 82.7==
(%)
and
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