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26-01-2017 #1
Hi to all,
My quiestion concerns Schneider Electric Altivar 12 frequency regulator.
I must configure an ATV12HU22M2 drive for PID control of an asynchronous motor
(2.2 kW, 50 Hz). My task is to configure the ATV12 drive so that to maintain
a preset speed/frequency, independently from the motor load (current),
using the motor current as a feedback, connected to AI1 analog input
(via current transformer + current transmitter). My initial intention is to use
the Jog Dial to manually set the desired frequency reference (motor speed).
So, my first question - is it possible, at all, to set the speed reference, in Hertz (!),
by Gog Dial (for example - 48 Hz) ?
I have SoMove software installed and Altivar 12 User Manual. But, I'm afraid,
I cannot, by now, to find out the right drive configuration.
At this moment, for the simplicity purposes, I have wired a potentiometer,
for a voltage feedback, to AI1 input. Here are the essential parameters (as to me)
I have set: CFG = PID
AI1t = 5 V
CHCF = SEP
PIC = YES
PIM = AIV1
LSP = 40 Hz (just for the test purposes)
HSP = 50 Hz
Then I rotate the jog dial, through the whole range 0-100 (which is % of WHAT ?),
as well as the potentiometer and see what happens.
The result is definitelly not what I want and need to see.
The output frequency oscillates between the two values - LSP and HSP,
according to the (Jog dial - potentiometer) combination.
So, I weel greatly appriciate any suggestions how to (re)configure the ATV12 drive
in order to set the speed by jog dial and maintain it.
Many thanks in advance !
Best regards,
Lyubomir
Sofia, Bulgaria
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