Section 2: Mapping data from the NX-SL5700 to the NX-CSG320 Mapping data from the NX-SL5700 to the NX-CSG320 is used when internal values from the safety program need to be exposed on EtherNet/IP, such as the state of Function Block, as shown below. In this example ESTOP_1_Monitor only turns on when the ESTOP button is not pressed in, and the RESET_IN signal has been applied to reset the Emergency Stop function block.