As the researches on Networked Control & Cyber-Physical System (NCCPS) are growing, the requirement of reliable evaluation tools for these systems is urgent. There are several simulators, such as TureTime, Ptolemy II and so on, can be used, but they usually focus on modeling of the control dynamics, and are too simple and abstracted on the simulation of network communication. In this work, a co-simulation tool, NCCPIS is presented, which integrates the dynamic control system simulator, Ptolemy II and the network simulator, NS-2. We demonstrate the validation of the tool by presenting a case study of platoon longitudinal control in AHS (Automatic Highway System).