The intelligent logistics conveying system for cardboard packaging is a core part of full-process intelligence in cardboard production, transport and warehousing. Its efficiency, precision and traceability directly affect a company's operating efficiency and cost control. With their high reliability, flexible expansion and intelligent Diagnostic function, the Solidot remote I/O modules of the XB6S series provide key support for signal acquisition and command execution in this system.
Solidot products used in this case study: XB6S-PN2002, XB6S-1600, XB6S-0016B

Workflow of the intelligent logistics conveying system: cardboard into buffer area -> rail car transfer -> conveyor belt connection -> elevator storage
[Cardboard into buffer area]
After the cardboard is formed, it is pushed from the end of the production line to the designated buffer area, triggering the start signal of the logistics system.
[Rail car transfer]
After receiving the dispatch command, the rail car moves precisely to the buffer area to load the cardboard and transports it along a preset path to the conveyor belt docking point.
[Conveyor belt connection]
The conveyor belt starts based on the rail car in-position signal and smoothly conveys the cardboard to the buffer zone at the elevator entrance, ensuring that the cardboard is stacked neatly.
[Elevator storage]
After receiving the conveyor belt completion signal, the elevator automatically rises to the target warehouse floor and completes cardboard storage via a built-in robotic arm or forklift device.
The system uses the PROFINET protocol. The digital input module XB6S-1600 and the digital output module XB6S-0016B are connected to the PLC via the coupler XB6S-PN2002, working together to perform signal acquisition and actuation output. The XB6S-1600 acquires field sensor signals, including rail car in-position detection, conveyor belt operating status, and elevator floor positioning; the XB6S-0016B outputs signals to the various actuators according to control system commands, assisting with tasks such as rail car start/stop, conveyor belt motor drive, and elevator up/down commands.
In conventional solutions, electromagnetic interference can easily cause false signal alarms or device disconnections, and troubleshooting relies on manual work. Solidot remote I/O modules not only ensure the real-time performance of signal acquisition and command output, but their superior interference immunity and intelligent diagnostic function further highlight the product's practical value and stable reliability in complex industrial scenarios.


Solidot remote I/O module XB6S series products support multiple bus protocols and offer function modules such as motion control and temperature input; the products have undergone strict EMC testing, provide superior interference immunity, and refuse to drop offline; they support diagnostics, alarms, and exception log recording, providing intelligent feedback and convenient use.

PROFINET filedbus coupler module(Flagship model)

16-channel digital input module, input NPN/PNP compatible, input filter default 3ms

16-channel digital output module, output PNP type