OPTO 22 GROOV BOX, User Manual

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TROUBLESHOOTING
groov Box User’s Guide for GROOV AT1
58
DNS (domain name server)
A DNS (domain name server) keeps track of the unique hostname for each device on the network,
so you can find it by name even if its IP address changes. If your network has no DNS, you won’t be
able to access the
groov Box using its hostname, but you can access it using its IP address.
To determine the IP address, you’ll need:
• a Windows PC on the same network subnet as the groov Box
• groov Find utility (on the CD that came with the groov Box). See “ Open groov Admin using groov
Find (Windows only)” on page 18 .
Once you’ve found your groov Box in groov Find, click the link to set up the Box. Also make a note of
the IP address shown, so later you can use it in your web browser instead of the hostname: for the
URL enter https:// plus the Box’s IP address. For example: https://192.168.1.54
Computer with more than one NIC
A: More than one NIC can cause a problem when you’re trying to communicate with groov using
your browser and the groov Box’s hostname.
Each NIC communicates on a separate network subnet. You may have one network subnet set up
for your computers and a second one set up for your control system, for example (this is a pretty
common scenario, and in fact we recommend it for security).
Make sure you’re trying to reach the groov Box using the NIC for the network subnet it is on. You
could unplug the Ethernet cable from your controller network NIC to force the PC to look for the
groov Box on the computer network. Then try again using your browser and the groov Box’s
hostname.
If your control system and your computers are on separate network subnets, you’ll need to set up
ETH1 on the
groov Box in order to reach your control system. See the next question.
Controller, Modbus device, or OPC UA server can’t be found
Are your control system and your computers on separate network subnets? We recommend this
setup for security reasons, and the
groov Box is designed to work this way. Here’s what to do so groov
can find your controller:
1. Plug the control network into ETH1 on the groov Box. (Remember, your computer network is
plugged into ETH0. The two Ethernet network interfaces on the Box are independent, so that
keeps the two network subnets separate.)
2.
Follow the steps in “Configuring ETH1 for the Control Network” on page 24 to configure the
ETH1 connection.
3. Now try configuring your controller or tag server again. This time groov should be able to find
it.
Cannot log into the groov Box using the hostname
When starting a groov Box, always wait until the SYS LED has stopped blinking before you try to
access groov . Otherwise, you might not be able to log in using the hostname. If this happens, try one
of the following methods to log in: