OPTO 22 SNAP PAC S Series, Руководство пользователя

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TROUBLESHOOTING
SNAP PAC S-Series User’s Guide 38
• 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
(form 1704).
• 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 10) 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 42 .
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 (form 1704) 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?
• Is the controller in bootloader mode? (If the reset button is held down for too long, the controller will
enter bootloader mode, which is indicated by the STAT LED blinking seven times quickly.)
If you still cannot ping the controller, contact Opto 22 Product Support. (See “For Help” on page 14 for
contact information.)
Solving Network Problems
If there are recurring problems in communicating with the controller, check your network. The wires, switches,
and other parts in your Ethernet network are not part of the Opto 22 hardware, but any problems in your
network may affect communication with Opto 22 products.
Create a Network Diagram
First, create a network diagram and verify the following:
• Cable connectors are firmly inserted.
• The switch has power. Switch LEDs indicate that the connection is up.
• Neither the PC nor the controller unit uses the switch’s uplink port.
• The controller’s LNK LED is lit.