Moxa Technologies CP-132U user manual Software Causes and Solutions

2.The MOXA board and driver are activated but cannot transfer (transmit/receive) data.

Hardware Causes and Solutions:

a.Make sure the cable wiring is connected correctly. Refer to the “Connection Cable and Cable Wiring” chapter for correct cable connections.

b.The cable or the board are probably defective. Try other ports, cables, or boards to verify this, or use the PComm Diagnostic utility to test the MOXA board’s and port conditions. If Diagnostic reports an error, replace the faulty components.

Software Causes and Solutions:

a.CP-132UL Series boards will check the line status (CTS) before transmitting data if the RTS/CTS flow control feature is set to Enable in the configuration or application program. Refer to the Connection Cables and Cable Wiring chapter for proper wiring diagrams, and check the line status of the suspected port using the diagnostic LED indicators on the mini tester.

b.The board controlling application might not be correctly written according to the corresponding API of the operating system. To check this problem, run another existing and known good application or use the utilities provided by Moxa (such as Pcomm Terminal emulator or HyperTerminal under Windows NT and Windows 95/98).

6-2 CP-132U Series User’s Manual