The main purpose of managing machine status is to reduce the amount of downtime and to reduce production costs. The easiest way to achieve this is by installing an SL-P6R1-WF/SL-PA6R1-WF intelligent module from ICPDAS, which monitors the output of the machine's indicators without affecting the operation of the equipment, thereby enabling the current operation stage of the machine to be mastered and ensuring timely command of the logistics system support in order to achieve production goals. The SL-P6R1-WF/SL-PA6R1-WF is a stack light monitoring module with Wi-Fi, Ethernet, and RS-485 interfaces. It includes 6-channel DC/AC digital input and 1-channel relay output that can be used to monitor the status of the stack light of the MES (Manufacturing Execution System) machine. The module can be used to detect the status of each color segment of the stack light as being either OFF, ON, or fl ashing. In addition to detecting the status of each individual color segment, the status of the combination of multiple color segments can also be defi ned, including the ability to report the duration of the previous status. The SL-P6R1-WF/SL-PA6R1-WF has WLAN connection which complies with the IEEE802.11b/g/n standards. With the popularity of 802.11 network infrastructure, the SL-P6R1-WF/SL-PA6R1-WF makes an easy way to incorporate wireless connectivity into monitoring and control systems. By integrating the SL-P6R1-WF/SL-PA6R1-WF module into your system, it is easy to implement stack light status monitoring on an MES via SCADA software to improve machine utilization and throughput. The SL-P6R1-WF/SL-PA6R1- WF also supports Modbus/TCP and UDP protocols and the network encryption confi guration that offer easy and safe access for users from any time and anywhere.