Dear Sir,

I want change velocity of axis while its moving in positioning mode.

i am using position axis command with velocity is assigned by a variable (FEEDROLL_VELOCITY_SP) as shown in image .

in ladder logic i have written logic for increase and decrease velocity (FEEDROLL_VELOCITY_SP) in this variable using push button.  

while axis is moving if changed value of this variable no changes in velocity occurs.

To achieve this in which variable i have to link this variable.

Thanks Chris,

super brilliant idea