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reached. While using the secondary SNTP server, SPA-ZC 400 tries to
change to the primary server in every third SNTP request attempt. Primary
server is used if the request is succeeded.
If both SNTP servers are offline, the event time stamps have status:
ClockNotSynchronized. If at least one SNTP server is online, but server
’
s
clock is not synchronized, event time stamps have status: ClockFailure.
Also, when time synchronization message is not received during the
startup, time stamping starts at 00:00:00 01.01.1970.
*
Time Zone Correction
Due to the SNTP time synchronization, a time offset must be added to the
SPA time synchronization message depending on the time zone. It affects
the IED HMI event list. The value (in minutes) is between - 720 and 720
and it is comparable to Greenwich Mean Time (GMT).
*
OSI addresses are read-only and they are always the same. The IEC 61850
client uses these addresses to access SPA-ZC 400 over MMS.
6.7.1.
SPA Communication parameters
*
SPA Address
SPA-ZC 400 needs also IED SPA address to access the SPA data. Every
logical device has SPA Communication Parameters Object properties
except LD0, which describes the SPA-ZC 400. The SPA Address object
property has to be the same as the configured SPA unit number in IED.
*
SPA Password
SPA Password is used for commands and it has to be the same as the
defined password in the IED.
SPA-ZC 400 has to know the SPA Password to write the data to IED.
Password (SPA parameter 0V160) is needed only for controllable integer
status (INC). The SPA Password has to be same as defined in IED MMI.
*
Bit rate
SPA-ZC 400 uses default bit rate 9600 bit/s. Other possible values are
1200, 2400, 4800, 19200 and 38400 bits/s. The used value has to be same
as the configured value in IED.
REF541/3/5 3.5 has special support for SPA-ZC40x 2.0 and GOOSE
horizontal communication. When protocol 2 mode is adjusted to the IEC
61850 mode, the serial port speed is set to 38400 bits/s. In this mode the
special SPA for horizontal communication is used and it allows to use
GOOSE.
*
SPA time synchronization
SPA-ZC 400 has three different modes of the IED time synchronization.
The mode is selected from the logical device object describing the IED,
for example LD1.
1MRS755347
Ethernet Adapter
SPA to IEC 61850 Gateway
Installation and Commissioning Manual
SPA-ZC 400
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