NPort 5600-8-DT/DTL Series Troubleshooting
Serial Data Problems
Try the following measures:
• Make sure there are no cable wiring issues. 3 or 8-wire cabling should be used for RS-232, point-to-point
4-wire cabling for RS-422, and daisy-chain 2 or 4-wire cabling for RS-485.
• Verify that all serial communication settings correspond with the attached device.
• Make sure there are no cable length issues. At 9600 bps, RS-232 cables should be no longer than 15 m,
RS-422 cables no longer than 1.2 km, and RS-485 cables no longer than 1.2 km.
• Check for RS-422 or RS-485 driving issues, such as terminator problems or pull
high/low settings.
• Check flow control settings. If you are using RTS/CTS flow control, you must have appropriate RTS and
CTS wiring.
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