I had succesfully about this, my gear include a HMI Delta for display DRO connect to a S7-200 PLC, my method is separate the number on DRO and use 2 byte for save this, Modbus of Mach3 just have 16bit and thereforce i must use a formula for this in Brain.

But it still have a problem with my formula is the second register save the value after the comma, ex: ,*********. Problem is the first charater after the comma is zero ex: ,0025 ,0233 ,...

My formula will give a wrong result with this type. In the photos i post have Z-axis is 5.0563 and my Formula will have 2 result is 5 and 563 and send to plc with last result is 5,563. This is a wrong number and i still find the way to solve this problem!