Answered FANUC R30iA JOG SPEED INCREASE

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$MCR_GRP[1].$fjog_enb
Minimum: 0 Maximum: 1 Default: 1 KCL/Data: RW Program:
RW UIF: RW CRTL: RW Data Type: BOOLEAN Memory: CMOS
Name: Fast Jogging Mode Enable
Description: Enables a fast mode of jogging. In this mode jogging motion
accelerate and decelerate faster. The lower override the faster the acceleration.
Power Up: Changes to this variable take effect immediately.

Reference - Fanuc RJ3iB System Variable Listing 

$SCR.$JOGOVLIM

$SCR.$RUNOVLIM