Need help with VFDs

Hello everyone,
I have a 2 VFDs in two different machines. Lets call VFD1 and VFD2. I have used analog output of VFD1 as reference or input of VFD2
I want VFD2 to run 25% slower than the reference provided by VFD1.
What parameters should i adjust to achieve this?
any help will be highly appreciated
It's almost impossible to answer without knowing the make & model of the drives. In general, just set VFD2's max speed parameter to the max speed at which you want it to run while VFD1 is at its max speed.