Omron CJ1W-FLN22, Operation Manual, Page: 183 / 277

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Troubleshooting Procedures Section 10-4
10-4-5 Basic Troubleshooting Check List
If you think there is a problem with the system, check the following general
points first.
10-4-6 General Precautions for FL-net (Ver. 2.00)
Refer to the FL-net transmission path standards earlier in this manual or to
IEEE802.3. The following restrictions and precautions also apply specifically
to FL-net Ver. 2.00.
No. Item
1 Is the FL-net Unit installed correctly?
2 Are the FL-net Unit switches set correctly?
3 Is the FL-net Unit’s IP address set correctly?
4 Is the Common Memory Area set correctly?
5 Are any of the FL-net Unit connectors or other connections loose?
6 Are the communications cables connected correctly?
7 Is cross cable being used for a 10Base-T/100Base-TX system?
8 Does the 10Base-T/100Base-TX cable have category 5 specifications?
9 Is power being supplied to the Ethernet Hubs and Repeaters?
No. Details
1 Communications data from other Ethernet networks cannot be transmitted
on FL-net (Ver.2.00) communications cables.
2 Do not connect the FL-net (Ver.2.00) to a router.
3 Switching hubs are not effective on FL-net (Ver. 2.00) networks.
4 Infrared and wireless media will greatly reduce the realtime communications
performance.
5 The realtime communications performance will be greatly affected by the
personal computer capacity and the OS and applications being used.
6 Use the specified IP addresses. Network addresses must be in order (the
standard network address is 192.168.250). IP address node numbers (sta-
tion numbers) within the input range are recommended.
Network address: 192.168.250
Node number: 1 to 249
Duplication of node numbers cannot be checked in the initial settings. Dupli-
cation will not be detected until communications are started and a node
number duplication error occurs.
7 Make sure that the ground line is connected properly and is sufficiently
thick.
8 Install the FL-net cables sufficiently far away from noise sources and avoid
laying cables beside power lines.
9 Realtime performance will deteriorate by the data capacity and other factors
when cyclic data communications and message data communications are
performed simultaneously.
10 The area used for cyclic data communications (Common Memory Area)
does not need to be allocated sequentially.
11 Set the SQE switch on the transceiver correctly according to the instruction
manual.