6.4.7 Quality bits in SMV frames
Table 17: Explanation of quality bits
Quality bit
Description
smpSynch Synchronization accuracy for all channels in the
SMV frame.
0: less than 4 µs synchronization accuracy
1: within 4 µs synchronization accuracy
test bit
The sender IED is in test mode.
invalid 01 & bad reference The sender time synchronization is uninitialized
(accuracy unknown).
The sender has time accuracy less than 100 ms.
invalid 01 The channel is not available.
questionable 11 & inaccurate The accuracy of the measurement value is
inaccurate or not supported.
derived The channel is derived from other channels, for
example, calculated residual voltage.
6.5 Engineering verification
This chapter gives a checklist of items to check and confirm during the engineering
phase. The complete test specification depends on the network topology and used
system components.
Check the configuration and settings with real system load and
topology.
In the Measurement view of the SMV receiver, the voltage values in
brackets indicate an invalid or a questionable measurement.
Table 18: SMV sender
Item
Description Checked
Missing sender Disable the SMV sender via Configuration/Communication/
Ethernet/SMVSENDER and verify the expected handling in
receivers. In the SMV receivers's Measurement view, the
voltage values should be in brackets indicating invalid or
questionable measurement. If The SMVSENDER is disabled
from the LHMI, it can only be enabled from the LHMI. Thus, in
this situation a configuration write from PCM600 does not enable
the SMVSENDER.
Internal fault test Force internal fault in the sender via Tests/IED test and check
that the receiving devices behave as expected.
SMV receiver monitored data is available in three locations.
Section 6 1MRS757809 C
Process bus and IEEE 1588 time synchronization
78 REC615 and RER615
Engineering Guide
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