User`s manual

NPort 5600-8-DT User’s Manual Troubleshooting
12-3
UDP Mode
Is the remote UDP program properly receiving and transmitting data?
If not, try the following:
 Clean up network traffic if possible to prevent data loss.
 Make sure your AP is configured with a resending mechanism when data is lost.
 Switch to TCP Server/Client mode
 Verify that the designated UDP port matches your application.
 Check for DHCP issues by having the DHCP server assign a fixed IP to the NPort.
 Open the specific UDP port to check for router filtering issues.
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.