OPTO 22 SNAP-PAC-S1, Руководство пользователя

Страница: 40 / 78

TROUBLESHOOTING
SNAP PAC S-Series User’s Guide
34
Communicating on a Wired Ethernet Network
If you attempt to connect to the controller using its IP address and you cannot, first check the
following:
• Make sure the controller has been turned on, the STAT LED is lit and not blinking, and the LNK
LEDs for the connected Ethernet interfaces are lit. (See LED information on pages
53 and 55 .)
• Verify that you typed in the correct address for the controller. Check the label on the side of the
controller, where the IP address should be written.
• Make sure the controller has been assigned a valid IP address and subnet mask. SNAP PAC
S-series controllers come from the factory with a default IP address of 0.0.0.0, which is invalid.
The default subnet mask is 255.255.255.0. To assign IP address and subnet mask, see the
PAC
Manager User’s Guide .
• Make sure you have up-to-date drivers installed on your computer’s Network Interface Card
(NIC). Contact your system administrator or the manufacturer of the card for help.
• Make sure any firewall in the computer (such as the built-in firewall in Windows XP) is
temporarily disabled before you try to assign or change IP addresses, load firmware using PAC
Manager’s Maintenance window, or work with files on the controller. BootP and FTP cannot
function through a firewall in the PC. Firewalls in a router are less likely to be a problem unless
certain ports (such as FTP client) have been blocked, either by default or on purpose.
Pinging the Controller
If you still cannot communicate with the controller after you have checked these items, try to reach it
using the PING application.
1.
Choose Start
→
Run and type
cmd
to open a command prompt.
2. At the prompt, type:
ping [controller’s IP address]
For example, type:
ping 10.192.54.40
At this point be sure to check for other devices on the Ethernet network that may have the
same IP address.
If the controller responds, go to “Maintaining the Controller” on page 39 .
If the PING command cannot be found , choose Start
→
Control Panel
→
Network. Make sure
TCP/IP is configured as a protocol and that an IP address and subnet mask are assigned.
If you see the message “Destination host route not defined,” the controller probably has an
inappropriate IP address and subnet mask. Make sure the IP address and subnet mask on the
controller are compatible with those on the computer. Follow directions in the
PAC Manager User’s
Guide to check the IP address and subnet mask on the controller and change them if necessary.
If you see the message “No response from host,” check the following:
• Are the computer and controller correctly connected? Is the controller turned on?
• Are the IP address and subnet mask on the controller compatible with those on the computer?