VLT
®
AutomationDrive EtherNet/IP
- P a r a m e t e r s –
MG.90.J1.02 – VLT is a registered Danfoss trademark
41
(12-90) Cable Diagnostics
Option:
*Disable [0]
Enable
[1]
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.
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:
Disable
[0]
*Enable [1]
Function:
Enables/disables 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:
Disable
[0]
*Enable [1]
Function:
Enables or disables the IGMP snooping
function. This prevents flooding of the Ethernet
protocol stack by only forwarding multicast
packets to ports that are a member of the
multicast group.
(12-93) Cable Error Length
Range:
[0] Error length Port 1
(0 – 200m)
[1] Error length Port 2
(0 – 200m)
Function:
If Cable Diagnostics is enabled in par. 12-90,
the build-in switch is able via Time Domain
Reflectometry (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 distance from the option to the error is
displayed in meters with an accuracy of +/-
2m.
The value 0 means no errors detected.
(12-94) Broadcast Storm Protection
Range:
[0] Protection Value Port 1 (*Off – 20%)
[1] Protection Value Port 2 (*Off – 20%)
Function:
The build-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
bandwidth 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.
(12-95) Broadcast Storm Filter
Option:
Broadcast
only
[0]
Broadcast & Multicast
[1]
Function:
Applies to par. 12-94; if the Broadcast Storm
Protection should also include Multicast
telegrams.
