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7.3 NX 0950 A Parameters Set Change Values
7.3.1 Description
For pumps like the COBRA NX 0950 A, two different current limitations are required:
•
1st limitation
: Current limitation set to the maximum output current of the frequency
drive. This will help to initiate the movement of the screws even in cold conditions.
This limitation will be set for the startup phase until a define frequency.
•
2nd limitation
: Current limitation set to nominal motor current. This limitation is set to
avoid a motor overload when the pump is in operation.
7.3.2 How to know if the machine has two set values ?
If "Value 1" and "Value 2" are shown in the parameters when opening the parameters
list in the software, your machine therefore has two set values.
Example:
•
5.090 para.set change
≠
0
7.3.3 Parameters not to be changed
There are some parameters you are not allowed to change.
If you need to modify some parameters to add or set a new functionality, please do not
change the following parameters as it may result to wrong running or possible damages
to the pump:
•
5.070 curr.limit.[%]
•
5.090 para.set change
•
4.230 VO function
•
4.231 VO on
•
4.232 VO off
•
4.233 VO on delay
•
4.234 VO off delay
Important: If you need to change some of the parameters described in the next chapter,
do not forget and make sure to set Value 1 and Value 2 with the same value!
