Product overview
EL6601, EL6614
16
Version: 4.2
Diagnostics
Online diagnostics
The following objects are available for initial diagnostic in the CoE directory:
• 0xFA01, subindex 01: Frame Counter Rx (incoming to RJ45 socket).
• 0xFA01, subindex 02: Frame Counter Tx (outgoing from RJ45 socket).
The values can be read from the controller using PLC function blocks (FB_EcCoeSdoRead in
TcEtherCAT.lib).
This and further diagnostic information from the CoE of the EL66xx are accessible via https://
infosys.beckhoff.com/content/1033/el6601_el6614/Resources/zip/2349552907.zip
.
Error LED
The red Error LED lights up 250 ms in the event of
• Ethernet Receive Overrun --> in general, more Ethernet frames are received at the RJ45 connection
than can be transported away via EtherCAT (PDO or mailbox). The telegrams are discarded.
• Ethernet EoE Overrun --> more non-real-time frames are being received at the RJ45 connector than
can be transported away by EtherCAT/EoE The data are discarded.
• Ethernet Frame Error
If the occurrence of an overrun causes data to be lost, higher protocol layers in an Ethernet network are
responsible for repeating the transmission.
Overruns
The following measures can be used to counter overruns:
• activating the
• Increasing/decelerating the cycle time of the publisher
• Suppressing temporarily publisher transmission or modulo in the System Manager
• Reducing/accelerating the EtherCAT cycle time of the subscriber, so that more data are fetched
by the EL66xx
Cable redundancy
If the EL66xx is operated in a system with cable redundancy, please keep the following in mind:
• real-time operation with network variables is possible
• in the event of non-real-time operation with IP transfer the IP traffic is routed via the primary EtherCAT
port. Therefore the Windows IP settings of this port are also used.
Fig. 12: IP settings EtherCAT port
If there is no longer a link to this port, from Windows under TwinCAT 2 or 3 there is also no IP
communication to this port currently.
For this reason, do not let the Ethernet connection between the primary EtherCAT port and the first
EtherCAT slave fail, since otherwise IP communication is no longer possible via the EL66xx.
