I finished my start-up and did some testing at this site last week. I got some interesting info.
First, coast down time on the blower from full speed to dead stop with drive power removed was 7:45 (seven minutes, 45 seconds)
With the original setup the controlled deceleration was 4:30. The technician had enabled the above mentioned F41 prameter already, but I hadn't known this.
I noticed that the speed dropped to 6-10 Hz in about 2:00 and that most of the deceleration time was dropping to zero from 6 Hz.
I had the technician enable DC injection braking at 6 Hz with 10% torque and 1 second duration. He also adjusted a user prameter that is not covered in the manual that increased the deceleration torque by raising the DC bus trip voltage. The result was that the VFD could decelerate the motor from a starting speed of 55-60 Hz to dead stop in 2:00 to 2:30.
My conclusion is that the GE Fanuc VFD has less deceleration torque available as standard (that is, without braking resistors) than the Cutler Hammer and Allen Bradley VFDs. Based on experience and SWAG interpolation I would say it has about half the deceleration torque. However, with some adjustment and set up it will provide a controlled deceleration that is within the acceptable limits of my process control system.