We recommend everyone who is using the Ethernet on the Nano-10, FMD or Fx Super PLCs to upgrade to the latest version of i-TRiLOGI version 6.51 & 7.11 due to an important change that can significantly improve Ethernet communication performance, by eliminating packet collision issues that lead to packet losses and poorer communication throughput.
The main changes take place in the LAN speed selection on the “Ethernet & ADC Configuration” screen. In the previous i-TRiLOGI versions the software wrongly define the the Ethernet interface as Full Duplex and the resulting incompatibility with auto-negotiated Ethernet switches causes a duplexity mismatch between the PLC and the Ethernet switch which can lead to frequent collisions and loss packets. Although communication is possible due to robustness of TCP/IP the Ethernet interface is performing at less than its ideal capacity..
With the newly released i-TRiLOGI version 6.51 and 7.11, the Ethernet port will be correctly set half duplex, which we find to work extremely well with auto-negotiated Ethernet switches and that can vastly improve the Ethernet port performance.
One you have installed the new i-TRiLOGI, all you need to do is to open the “Ethernet & ADC Configuration” screen and then click on the “Retrieve parameters from PLC” button to retrieve previous Ethernet settings. Then immediately click on the “Save Parameters to PLC” button and all the settings with be written back to the PLC and the Ethernet port will be set to 10 or 100Mbps Half duplex, which is the correct settings. This simple procedure is all you need to do to see immediate improvement in the Ethernet port performance.
The new software also allows the Ethernet port to be set to “auto-negotiation” for PLC firmware that supports this setting (>= r84G or F91.2, See
Firmware Upgrading ). This is the only mode where a 100Mbps Full duplex communication can be established between the PLC and an Ethernet switch.
Note: These changes are also carried to the latest
CO5 Uploader version 2.2. (CO5 Uploader is a free software that TRi provides to its OEM customers to allow re-programming the PLC without giving end users the .PC6 or .PC7 source files).