Barcode print: the key to efficient logistical operations
Barcode and label printing is one of the most critical parts of logistical operations. Labels usually represent the business process at its endpoint, slowdowns, failures to print, or duplicates, will have very costly consequences, failures to print mean the business process itself fails.
By carefully analyzing the TCP flags in the print stream as well as the status of the printer at all stages of print delivery, LRS software minimizes the risks of duplicate labels, print slowdowns, and failures. To accomplish this, LRS invented our own delivery method over sockets called SOCK/ZPL.
With time, new models of Zebra label printers and some SATO models have added built-in support for the PJL protocol. This is a major advantage over the previous SOCK/ZPL approach especially when warehouse printers are turned off or fail in the middle of print delivery (especially when new media must be reloaded).
Before PJL support on label printers, any such failure would require reprinting all the labels in a batch and manually removing the duplicates. As a typical customer may have hundreds of labels in a single job, any required restart is a risky, slow, manual process.
With support for PJL this is no longer true; the print will be restarted after device failure exactly at the label it failed at. LRS software takes full advantage of the PJL capabilities of newer label devices for increased reliability and performance and less risk of costly business disruption.