Issue
Can a USB-connected printer be used as a Live Alarm Printer configured for continuous printing?
Product Line
Satchwell BAS & SigmaEnvironment
- USB-connected printers
- Satchwell Sigma
Cause
Sigma’s continuous alarm printing feature requires a persistent connection between the print queue and the printer. This connection keeps the communication port open at all times to ensure uninterrupted printing of alarms.
However, USB ports are designed to operate in a session-based manner. They do not support maintaining an open port indefinitely, which is essential for continuous printing. As a result, USB printers cannot fulfill the requirements for Live Alarm continuous printing.
Resolution
- USB printers are not compatible with Sigma’s continuous Live Alarm printing feature.
- USB “Page Printing” mode functions correctly and can be used for non-continuous alarm printing.
- For continuous printing, use a printer connected via a parallel or serial port, or a network printer that supports persistent connections.
