SMY133-SMY134-SMP133 Operating Manual
•
Daylight Saving
… This option controls automatic winter/summer local time
switching
•
Time Synchronization
…
As the built-in real time circuit has limited accuracy while free
running, with this option it is possible to keep the RTC time in synchronism with an external
precise time source. The RTC can be synchronized by :
•
Pulse Per Second / Minute
(
PPS / PPM
) … A digital input is used for time
synchronization from an external source at this case. The instrument sets the RTC
to the nearest second or minute as soon as a synchronization pulse is detected.
Second-, Minute-, quarter-hour- or hour- synchronization pulses are accepted.
•
NMEA Message
...If an instrument is equipped with the RS-485 remote
communication interface an external ( usually GPS-based ) time receiver can be
connected to. The receiver must be set to transmit the “ZDA”- or “RMC ”-message
(NMEA 0183 protocol). The communication interface must be set appropriately
(usually 4800 Bd, 8 bits, 1 stopbit).
•
NTP Server
...The option can be used if an instrument is equipped with the Ethernet
communication link and a NTP-server is available in the network. Set IP-adress of
the server. Then time synchonization is performed every hour.
•
Network Frequency
… For this option, the nominal frequency
f
NOM
parameter must
be set properly. Otherwise the synchronization will not work.
Warning
: When editing clock parameters, it must be taken into account that internal data
archives are affected : when changing the date or time,
all archives are cleared
!
4.2.11.5 Average Values Processing Setting
In this parameter group average values processing for the
U/I
-,
P/Q/S
- and, optionally
RCM
-group of
measured quantities can be set. Detailed explanation can be found in the chapter
Average Values
Evaluation
further below.
4.2.11.6 Embedded Electricity Meter Setting
In this group parameters concerning electric energy registration and maximum active power demand
processing (MD) can be set. For detailed parameter description see the chapter
Embedded Electricity
Meter
further below.
4.2.11.7 Power Quality & Input/Output Setting
There are only overviews of parameters. To edit them, use the ENVIS-DAQ program.
You can only clear the voltage events table in the power quality setup group.
4.2.11.8 Ripple Control Signal Setting
•
Method
… Method of the signal evaluation can be set either to
Filter
or in compliance with
the IEC61000-4-30
standard
•
f
RC
… frequency of the ripple control signal in Hz
•
U
RC
unit
… ripple control voltage unit : either V or percent of
U
NOM
•
U
RC
threshold (U
RCTR
)
… minimum signal level to be recognized as „pulse“. Relevant for
telegram detection, signal below the threshold is recognized as „gap“.
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