6.4.2 SMV control block
Table 8: Sampled value control block attributes
SVCB attribute
Description
SvID A sampled value control block specific string. The
default value is <IedName>MU01.
Multicast address A multicast addressing scheme is used when
sending sampled values messages. A multicast
address can be shared by several sending devices
or it can be IED specific. To keep the multicast
message filtering of the devices working, it is
recommended to use a unique multicast
addresses.
SVCB name
The name of the SVCB structure seen by the IEC
61850/MMS client.
Data set Data sent in sampled values messages to the
network.
ConfRev ConfRev increases when the referenced data set
is modified. Both the sampled values sender and
the receiver must have the same ConfRev value.
This ensures that both IEDs have the same
configuration level in the substation configuration.
ConfRev usage is done automatically by the tools.
If the latest system configuration is not
downloaded into all required IEDs, the
configuration revision may differ between the
receiver and sender.
MAC Address Multicast MAC address to which the specific
sampled values data is sent. The receiving IED
filters the frames and starts to process them if a
specific multicast address is defined in the
configuration. It is recommended to have one
unique multicast address per SVCB. The address
range for sampled values Multicast addresses is
01-0C-CD-04-00-00...01-0C-CD-04-01-FF.
App ID Unique HEX value application identifier for
sending the SVCB within the system. It identifies
the purpose of this particular data set. Value range
for sampled values is 0x4000 to 0x7FFF.
VLAN-ID
Used if the Ethernet switches in a station bus
support VLAN. If static VLAN identifiers are
defined, it also affects the switch port
configuration. Value “000” indicates a non-
configured VLAN and switches do not filter these
messages on a port basis. This is recommended if
there is no need to split the logical network. The
VLAN identifier is a 3-character HEX value with
range 000...FFF. Recommended values are
2...1001.
VLAN Priority Used in networks supporting VLANs. The priority
is used with network switches. The default value
for sampled values is “4” and the value range is
0...7.
Sample Rate
Amount of samples per period.
Table continues on next page
Section 6 1MRS757809 C
Process bus and IEEE 1588 time synchronization
72 REC615 and RER615
Engineering Guide
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