What causes Concept Modbus connection error 'OL9-1501 Timed out waiting for response from controller'.

Troubleshooting:

• If configured for MB RTU mode, switch to ASCII mode. Put switch in ASCII position and connect to MB1 with ASCII 7, 1, even.
• If using USB converter, turn off wireless card , if present.
• Disable AB drivers
• Confirm pinout of Modbus cable.

MB parameters correct?  9600, 8, 1, even

Publicado para: Schneider Electric Portugal