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© Sealevel Systems, Inc.
SeaI/O | SL9049 11/2021
Appendix C
–
Troubleshooting
Problem: The SeaI/O module starts up with a strange IP address (i.e., 169.254.x.x).
All Ethernet (E-series) and Wireless (W-series) SeaI/O modules are shipped with DHCP enabled. If no DHCP
server is available or the DHCP server cannot be reached, Ethernet SeaI/O modules default to a random IP
address in the range 169.254.x.x. Wireless SeaI/O modules default to a random IP address in the range
192.168.0.x. Change the PC’s network settings to place both the SeaI/O module and PC
on the same subnet.
Adjust the SeaI/O module’s IP address and Netmask using the Ethernet Config utility (Start
→
All Programs
→
Sealevel SeaMAX
→
Ethernet Config) installed with SeaMAX. Then restore the PC’s network settings.
Problem: The SeaI/O module is visible in Ethernet Config, but the network settings cannot
be changed.
The SeaI/O module is most likely on a different subnet than the PC. The PC’s IP address and Netmask must be
altered to place both the SeaI/O module and the PC within the same subnet. Contact your network administrator
for assistance.
Problem: The SeaI/O module doesn’t show up in Ethernet Config.
Ethernet and Wireless SeaI/O modules are discovered via a UDP broadcast. Verify that any firewall software,
such as Windows Firewall, Zone Alarm, etc., or router settings that would hinder UDP transmissions are disabled.
It is also possible that the SeaI/O module may not be discovered if the PC and module are on separate subnets.
This may occur if the module’s IP address is configured outside the range of the PC’s subnet. It can also occur
during a failed DHCP discovery. In either case, the “Recover Module” button in Ethernet Config utility may be
used to recover the device. Refer to the Hardware Configuration section of this manual for more information.
Problem: The rotary switch (ADDR) was used to reset an Ethernet (or Wireless) SeaI/O
module, but it no longer responds to a ‘Get’ operation.
If you reset the SeaI/O module by rotating the rotary switch clockwise one full revolution, the RS-485 port will
reset to 9600 bps and no parity, but the Ethernet port will remain unaffected.
The broadcast feature in MaxSSD sets the SeaI/O module’s TCP/IP to RS
-485 translation data rate
independently of the SeaI/O module itself. Therefore, if you have an Ethernet or Wireless SeaI/O module and
you set the data rate to 115.2K bps via a MaxSSD broadcast command, both the RS-485 port and the Ethernet
port will respond thereafter to 115.2K bps, as expected. Using the rotary switch will reset the RS-485 port, but
the Ethernet port will still try to communicate at 115.2k bps. To restore communications, broadcast a set data
rate and parity command (9600 and no parity) via MaxSSD.
