Appendix C. Troubleshooting - ICP DAS USA ET-7H16M Series User Manual

Appendix C. Troubleshooting

A number of common problems are easy to diagnose and fix if you know the cause.
Symptom/Problem
The Run LED doesn't light
The Run LED indicator is ON
(light), but not flashing.
Cannot communicate via the
Ethernet port, but the
PET-7H16M is still operating.
Able to explore the web page
through port 80 using a web
browser, but Modbus/TCP
program cannot access the
module through port 502.
Modbus/TCP program can
access the module through
port 502, but Web browser
cannot explore the web page
through port 80 using a web
browser.
PET-7H16M Series User Manual, version 1.0.1
Possible cause
Internal power has failed
The module has possibly
crashed.
The IP/Mask/Gateway
address isn't within the IP
address range of the LAN.
The IP address has
restricted by the IP filter
settings
There are more than 30
TCP/IP connections.
Port 502 has been
restricted by the firewall.
The Port 502 has restricted
by the firewall.
The Web Configuration
function has been disabled.
(Shown on the Basic
Settings page)
The Web server TCP port
has been changed from
port 80 (Shown on the Basic
Settings page)
Solution
Return the module for repair.
Reboot the module
Change the IP/Mask/Gateway
address to match the LAN, or
ask the MIS administrator for
assistance.
Check the IP filter setting using
the Web configuration.
Reboot the module.
Consult your MIS administrator
for assistance.
Consult your MIS administrator
for assistance.
Enable the Web Configuration
function using either the SMMI
or the console.
Change the TCP port to 80 or
reconnect the PET-7H16M using
the specific TCP port.
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