Danfoss VLT MCA 121 EtherNet/IP

6.2.6 Advanced EtherNet Settings
12-90 Cable Diagnostics
Option: Function:
Enables/disables advanced Cable diagnosis function. If enabled, the distance to cable errors can be
read out in par. 12-93. The parameter resumes to the default setting of Disable after the diagnostics
have finished.
[0] * Disable
[1] Enable
NB!
The cable diagnostics function will only be issued on ports where there is no link (see par. 12-10,
Link Status )
12-91 Auto Cross-Over
Option: Function:
[0] Disable Disables the auto cross-over function.
[1] * Enable Enables the auto cross-over function.
NB!
Disabling of the auto cross-over function will require crossed Ethernet cables for daisy-chaining the options.
12-92 IGMP Snooping
Option: Function:
This prevents flooding of the Ethernet protocol stack by only forwarding multicast packets to ports
that are a member of the multicast group
[0] Disable Disables the IGMP snooping function.
[1] * Enable Enables the IGMP snooping function.
12-93 Cable Error Length
Option: Function:
If Cable Diagnostics is enabled in par. 12-90, the built-in switch is able via Time Domain Reflec-
tometry (TDR). This is a measurement technique which detects common cabling problems such as
open circuits, short circuits and impedance mismatches or breaks in transmission cables. The dis-
tance from the option to the error is displayed in meters with an accuracy of +/- 2m. The value 0
means no errors detected.
[0] Error length Port 1 (0 – 200m)
[1] Error length Port 2 (0 – 200m)
12-94 Broadcast Storm Protection
Option: Function:
The built-in switch is capable of protecting the switch system from receiving too many broadcast
packages, which can use up network resources. The value indicates a percentage of the total band-
width that is allowed for broadcast messages.
Example:
The “OFF” means that the filter is disabled –all broadcast messages will be passed through. The
value “0%” means that no broadcast messages will be passed through. A value of “10%” means
that 10% of the total bandwidth is allowed for broadcast messages, if the amount of broadcast
messages increases above the 10% threshold, they will be blocked.
[0] Protection Value Port 1 (*Off – 20%)
6 Parameters MCA 121 EtherNet/IP
40 MG.90.J2.02 - VLT
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