Measures If Is Displayed In "Network Status" Even Though Loopback Is Not Performed; If The System Does Not Contain A Switching Hub; If The System Contains A Switching Hub - Mitsubishi Electric QJ71GF11-T2 User Manual

(2) Measures if
not performed
(a) If the system does not contain a switching hub
Ring topology is configured even though the loopback function is disabled.
Take the following measures:
• When not using the loopback function
Disconnect an Ethernet cable connected to any station on the network (either PORT1 or PORT2).
The network topology will become a line topology and data link will start.
• When using the loopback function
1) Enable the loopback function and rewrite the network parameters to the CPU module.
( Page 178, Section 8.7)
2) Check if the master/local module on the master station supports the loopback function.
( Page 546, Appendix 8)
If the module does not support the loopback function, replace it with one that does.
(b) If the system contains a switching hub
• is displayed due to any of the following causes:
• Ring topology is configured even though the loopback function is disabled.
• Star topology is configured even though the loopback function is enabled.
• The network is incorrectly configured in ring topology.
Take the following measures:
1.
Check if the loopback function setting is correctly configured. (
If incorrect, correct the network parameter and rewrite it to the CPU module.
When data link starts across the entire network, this procedure is successful.
If data link does not start, take the measures described 2 or 3.
2.
When the loopback function is disabled, take the following measures.
1) Disconnect one Ethernet cable connected to the switching hub and power off and then on the hub.
(Repeat this operation until data link starts over the network.)
2) When data link starts across the entire network, check the network map using the CC-Link IE Field
Network diagnostics. (
3.
When the loopback function is enabled, take the following measures.
1) Configure the network in ring topology without a switching hub.
Connecting a switching hub will cause a problem such as data link failure.
( Page 54, Section 5.2.3 (2))
2) Check if the master/local module on the master station supports the loopback function.
( Page 546, Appendix 8)
If the module does not support the loopback function, replace it with another that does.
is displayed in "Network Status" even though loopback is
Page 206, CHAPTER 9)
CHAPTER 9 CC-LINK IE FIELD NETWORK DIAGNOSTICS
Page 178, Section 8.7)
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