Hi,

i have a sinamics v20 3kw inverter driving a centrifugal pump, my application is very simple, it needs a constant run speed and I would like to manually adjust the pump speed and thus water flow via the control panel buttons. It will be started and stopped using an external relay.

i have connected the first digital input to the relay and the +24v to the other side and connected the 0v to the dic terminal. I then enabled connection macro 2, this gave me external control but speed control via a potentiometer which I did not have connected.

in trying to set the correct parameter to allow for on panel speed control I now don't have any external control under any connection macro, at the moment I can only get the drive to run in manual.

when I try to change some of the parameters, I think 700 and 701 were examples, I enter the parameter number, then press ok, then I get "ln000" if I press again I get the function number, do I leave ln000 alone or put my function number in here also?

i think I also need to do a factory reset and start again, how do I do this?

thanks

The attachment shows the run command which you have working I believe?

Now locate P1000:0, this defines where the 'setpoint' comes from, set P1000:0 to 1.

Now, locate P702:0, this defines what din2 does, (terminal 9) set this to 13, MOP  up.

Now locate P703:0, this defines what din3 does, (terminal 10), set this to 14, MOP down.

Notes:

MOP, this is 'Motor potentiometer'.

P702:0, the ':0 bit' of all these parameter numbers provides for different 'control data sets', make all youre settings in ':0' or :000, as this is how it appears on the display.

Also:

MOP, Motorized Potentiometer, has  a few functions which may be useful:

P1031:0 = 1, last set point stored, set point memory, here the drive will log the last set point, and go there at start up. (P1031:1 set point not stored).

P1032:0 = 1, this inhibits negative set points.

P1040:0 = 5Hz, here you can set the set point to which you want the speed to go to at making the run command.

Bit of a list here but hoping you pick out the bits which are useful to you, it is useful to a test here before i make all these recommendations, but I do not have a device to test here.

Come back if there are any snags with this or any questions arise.

Ahhh, may have misread yr requirements??

You need the MOP set point from the front keypad, on the drive itself, and not remote buttons?

Standby, need to have a new look.....

The drawing which I have sent will give a run command by remote switch, terminal 8 to 13.

P700:0 = 1, operator panel, 'keypad;.

Check, P1000;0 = 1, MOP set point.

Check P701:0 = 1, digital input run command from terminal 8.

Apologies for the extended, and wordy response.

tractor