llTargetOmega(<1.0,3.0,0.5>, TWO_PI, 1.0);

// Read back this prim's current target omega
list current_omega = llListToList( llGetPrimitiveParams([PRIM_OMEGA]); // should be [PRIM_OMEGA, axis, spinrate, gain]
vector axis = llList2Vector(current_omega, 1); // Should be <1.0,3.0,0.5>
float spinrate = llList2Float(current_omega, 2); // Should be TWO_PI
float gain = llList2Float(current_omega, 3); // Should be 1.0

// Set a linked prim rotating
llSetLinkPrimitiveParamsFast(LINK_THIS, [PRIM_OMEGA, <1.0,3.0,0.5>, TWO_PI, 1.0]);