hi everyone, i hope you are well and safe in these strange times.

First let me tell you what i am trying to do:

i have a pid loop running a fan and the pid control is being done on the VSD (vfd) itself and i am inputting the pid reference from the logo and reading the pid feedback from a pressure transducer into the drive. The drive has an option for me to read the pid feedback so i can then enter this into the logo but for some unknown reason the output from the drive is only 0-6.7Volts !!! strange i know but i need to convert that voltage to -124.00Pa  ---- 124.00Pa to display on the logo.

i understand i need to do it through the analog amplifier and a mathematical instruction but i unable to work how or what the calculation should be. I would me most grateful if someone could explain how to get this calculation.

many thanks

thanks. sorry for the confusion but:

i am reading the feedback signal from the drive which is 0v - 6.6v and i need to scale that to -124Pa to +124Pa

the pressure sensor input is directly going to drive and that is ok