MVI56E-GSC

The two application ports operate independently, allowing each connected device to use its own baud rate, framing and handshake method. Each port can receive and transmit strings or byte streams up to 4096 bytes. The module moves these messages through a 500-byte input image and a 496-byte output image; the controller logic performs the application-specific parsing, command construction and response handling.

Receive completion can be determined by termination characters, elapsed message timeout, intercharacter delay or a configured packet length. These conditions can be combined in a termination bitmap, with the first satisfied condition completing the message. Stream mode requires particular care because continuous traffic can demand time-critical controller processing; framing should follow the connected device protocol rather than an arbitrary fixed delay.

Port parameters reside in the controller configuration tags and are transferred to the module by the sample logic or Add-On Instruction. AOI integration requires RSLogix 5000 version 16 or later; earlier supported projects use the appropriate sample ladder. The Ethernet service port provides access to ProSoft Configuration Builder diagnostics, communication analysis and module status. Following configuration changes, use the documented warm-boot, cold-boot or power-cycle method and prove the data exchange before releasing the process.