Inverter Control

Hi there.

I have a problem which I am finding impossible to rectify. I have read through the installation manual but cannot find an answer.

I wonder if anyone has had a simalr problem when wiring thier machines.

My problem is: Restricted remote frequency control.

I have a Mitsubishi FR-S500 inverter wired to supply my lathe motor and have recently wired in a remote control panel on the lathe for convenience.

All seems to be working OK except that the remote frequency control (set to EX on inverter) will only increase to 52 hertz when parameters are set to allow up to 90htz. If set to PU, inverter control the full 0-120 is available.

I have used a 1k 1watt potentiometer to control the frequency and have checked the varying voltage across connections 10-2-5 and am getting 0-5v as would be expected.

The parameters I have set are as follows:

P1-90..P2-10..P3-50..P30-1..P59-1..P79-0

Maybe I am asking something outside the parameters of the inverter but surly not.

Any help will be very much appreciated as I am completely flummoxed. Thankyou.

Try changing P73 to 1

John S.

According to my manual P73 should be set to 0 for 0 - 5V input on terminal 2. Also check that the voltage gain parameter C4 is correctly set, it should be somewere near 100%.

Did you try the suggestion made last time you asked.

Russell.