no velocity offset pdo assignment?

[1190201119]

on RxPdoStandard, RxPdo only mapped target velocity, no velocity offset( no target velocity on 0x1605). So when using ModeofOperation CyclicSynchronousPositionMode, I can't send velocity offset command (target velocity on take effect on CyclicSynchronousVelocityMode or profiled velocity mode). So why not assign 0x1617, like assigning torque offset?