CET Electric Technology
49
4.6.1 SNTP
SNTP
(Simple Network Time Protocol)
can be used to synchronize the clock through the connected
Ethernet port providing that the network has been properly configured for the PMC-690 to connect to
the
SNTP Server
, wherever it resides.
The SNTP supports two time synchronization modes: Unicast and Broadcast.
Unicast: the PMC-690 would connect to the SNTP Server automatically as per specified
SNTP Sync.
Interval
to synchronize time. The programming of the
SNTP
setup parameters are supported via the
Front Panel or communications and provides the following setup parameters:
Setup Parameters
Option
Default
Clock Source
0=RTC, 1=SNTP. Set
Clock Source
=1
SNTP Sync. Interval
1 to 1440 minutes
60
IP Address of SNTP Server
Set the IP address of the
SNTP Server
192.168.101.2
Table 4-31 SNTP Setup Parameters
Broadcast: the PMC-690 would receive packets of broadcast time synchronization from the intranet
and compare clock if the time difference between intranet and the device is less than 5 minutes.
4.6.2 Modbus
Modbus can be used to synchronize the PMC-690’s clock through the communication. Set the
Clock
Source
as
RTC
via the Front Panel or communication, then set the register values of 60000 to 60005 or
9000 to 9005, please refer to
Section 5.9 Time Registers
for a detailed description.
4.7 Communication
4.7.1 Ethernet Port
The PMC-690 comes standard with one 100BaseT TCP/IP Ethernet port with RJ45 connector for
connecting PC for firmware upgrade, configuration and data analysis. The IP Address, Subnet mask and
Gateway under device setup are required to be configured so as to match the settings in the
corresponding application software on PC for establishing a connection.
4.7.2 USB Port
The PMC-690 comes standard with an USB port for data transfer to the USB storage device. After
inserting a reliable USB drive into the USB port, the system would detect the drive and users can transfer
data, waveform logs as well as event logs via the user friendly interface in the Front Panel.
4.8 Data Storage
The PMC-690 is equipped with a removable 16GB SD card for non-volatile data storage for SDR data,
events, WFR log and facilitating easy data transfer to PC. Most importantly, SD Card storage is much
more reliable than HDD because it has no moving parts and is immune from mechanical breakdown.
The 16GB SD card is sufficient for a site to perform continuous monitoring for about half-year.
The table below illustrates the directories and stored data:
Data
Directory
Screen captures
/hmi
Device Logs
/data/device/device/deviceLog
User Folders
/data/customFile
Site parameter templates
/data/site/site n/Cfg/para.ini
Present monitoring system parameters
/data/site/site n/20230414_071155/Cfg/param.ini
Present Peak Demands
/data/site/site n/20230414_071155/Demand/this
Содержание PMC-690
Страница 1: ...PMC 690 Hand Held Power Quality Analyzer User Manual Version V1 0A Aug 27 2018...
Страница 21: ...CET Electric Technology 21 Energy Demand Harmonics Spectrum Table Power...
Страница 23: ...CET Electric Technology 23 Max Min Setup Basic Device Storage...
Страница 24: ...CET Electric Technology 24 Advanced...
Страница 25: ...CET Electric Technology 25 Site New Site Switch Site Delete Site Rename Site Import Template Export Template...
Страница 26: ...CET Electric Technology 26 Monitoring History Table 3 2 Description of each Hierarchy...