Unable to communicate, signal converter TX solid red; Bad serial cable

Potential Symptoms

  • Unable to communicate to the display.
  • Signal converter has a red TX LED lit solid.
  • Loopback test passes out of DB9 connector of computer and/or USB to serial adapter but fails on DB25 end of serial cable (input to signal converter).

Environment

  • Product Family: Message Displays
  • Product: Galaxy
  • Component: RS-422 communication, DB9 to DB25 serial cable
  • Control System: Venus 1500 v3 or v4

Cause

  •    Failed serial cable.

Resolution

  • Replace DB9 to DB25 serial cable between computer and signal converter.

KB ID: DD4161424


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