The invention relates to a medical effector subsystem and a drug delivery pump sub-component. The medical effector subsystem includes: a drug delivery pipe which contains drugs with a variable controlled flow speed and is disposable for delivering drugs to patients; b) a pressure sensor which has output signals and is suitable for sensing inner pressure of drugs in the delivery pipe; and c) a storer containing a block program which is operatively connected to the output signal of the pressure sensor when it is operated on an operator, wherein the block program has a variable pressure alarm setting value and alarm the user that the drug delivery pipe is blocked when the output signal of the pressure sensor exceeds the variable pressure alarm setting value; and the alarm program is able to at least partly, directly or indirectly change the variable pressure alarm setting value according to the variable controlled flow speed of drugs.