In ACS355, how to use programmable digital inputs to set reference?

For programmable digital inputs, they have PNP and NPN configuration where they are connected to the ground or supply via switches. Because of this connection, I am very confused about how to set them values and how to become programmable. Also, as I reviewed 11 reference select in chapter Actual Signals and Parameters, it says about parameter 1103 REF1 SELECT, DI3U,4D(R): Digital input DI3: reference increase. Digital input DI4: reference decrease. This makes me confused about how to use digital inputs as reference.


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wu_ruiying   

asked 1 month ago
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Answers

1

Hi
the digital input is selected to have up to 8 constant speed to use in the drive.
But you need before to made one simple choice: if you want to use the digital in PNP mode or NPN.
If you choose PNP mode, please made one wire connection between pin 10 and 11 in the main terminal box.
Then, with DI3-4-5 you can select up to 8 fixed speed, in macro standard. Referring to chapter "parameter and effective signals" - group parameter 12.

In this case, DI1 is used for "start" function and DI2 for "reverse rotating".

The particular configuration that you have descripted in your post regarding one different operation mode and macro: moto potentiometer, that you can use when you don't need one analog reference for input speed
I'll suggest you to read very carefully the manual of the drive: every functioning mode is descripted very well.

Or contact you local ABB dealer for one base course in ACS355: they can offer you one complete training program about ABB products.


Flavio Mussolin   

answered 1 month ago


 


By wu_ruiying on 7/30/2017 | Like (0) | Report

Hi Flavio,
Thanks a lot for your help!
Do you mean that I don't need to consider how to control the switch between DIs and supply?

Actually, I am going to run a torque control. Since I found that there are several ways to set reference signal: AI,DI and PC tool. And get stuck in DI. It seems that DI is used to set reference only for some specific modes, right?

Thank you so much for your help!


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