GPS masTER CLOCK - Instrumentation and Automation Solutions
Contents
1. GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 OPERATOR S MANUAL GPS masTER CLOCK MASIBUS AUTOMATION amp INSTRUMENTATION P LTD B 30 GIDC Electronics Estate Gandhinagar 382044 Gujarat India Ph No 91 19 23287275 23287279 Fax No 91 19 23287281 23287282 Email support masibus com sales masibus com Operator s Manual Page 1 of 36 GPS masTER CLOCK Model MC I Doc Ref No m05 om 101 1 Introduction 2 Specifications 3 Time Signal Outputs 3 The 1 PPS Signal The Event Signal The IRIG B Signal Optional NTP SNTP Time Protocol Optional Event Outputs RS232 Outputs 3 6 1 NMEA GPRMC Format 3 6 2 NGTS Format 3 6 3 T Format Format ww www DURBWNH 4 Installation 4 1 Packing List 4 2 Mounting the Unit 4 3 Mounting the Antenna 4 4 Antenna Cable 4 5 Suggested Assembly Order 4 6 Self Monitoring 4 7 Available Alarms 4 8 Time Output Ports 5 Connection Diagram 6 User Configuration 6 1 Initializing the Configuration Precautions Configuration Command amp Password Communication Commands Time Zone Offset Command LCD Display Commands Command For Selection of Format on COM2 Event Command Additional Event Outputs Password Command Miscellaneous Commands Example Or O Oy OY OY OY OY O O OY Ox Oy HAH H HO DONA WW WN HO Appendices A The Global Positioning System GPS B Applicability of GPS masTER CLOCK C Health 8 Safety2. PHYSICAL DIMENSIONS EXTRA MODULE OPTIONAL RS232 to RS485 Converter Maximum Distance 1 2 km Power Requirement 24 V DC 19 Rack Mountable Width 426 mm 18 35 Depth 300 mm 11 84 Height 2 U 88 mm 3 46 Weight 4 Kg ENVIRONMENT Temperature Operating 0 C to 45 C Storage 40 C to 85 C 3 TIME SIGNAL OUTPUTS 3 1 The 1pps Signal This is a very important timing signal It is the TTL level pulse with a width of 200ms isolated output coming from the GPS receiver This 1pps is connected to the BNC connector on the rear panel The signal is an isolated event output through a static relay contact This signal is connected to two of the terminal of the 8 way barrier strip on the rear panel of the device the event is assigned as isolated event the frequency for this event can be configured as 1 minute or 1 hour The pulse width of the event is 1 second The IRIG B format is a serial format based on a message frame per second which is Co ordinated with the synchronized 1pps time output pulse There are two alternative forms of output a dc level shift output and a modulated output The modulation frequency is 1 KHz For each form of output there are three output codes a A Reference Mark b A logical 1 Operator s Manual Page 6 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 c
3. As for the flat plane case a measurement from an extra fixed point is required to absolutely resolve the ambiguity although in many cases the ambiguous point would be below the surface of the world Thus to achieve the objective GPS must provide accurate measurement of distance from the unknown location of the receiver to 4 known points Electromagnetic radiation travels at a constant speed of approximately 300 m us so if one could measure the time for radio waves to travel to the unknown point from four known points then one could calculate the position of the unknown point This relaxation makes the GPS system practical The fixed points consist of an array of 24 satellites each of which are at a height of 20 183 km 10 899 nautical miles and orbit the earth every twelve hours They are distributed between 6 orbits which are evenly spaced around the equator and inclined at 55 to it This means that a minimum number of the satellites are always in view from any point in or over the world The complete system consists of 3 parts A A Master Control Station This is at Colorado Springs in America and receives information on the status clock data and position of the satellites from 5 Monitoring stations which are spread around the World It transmits control data to the satellites via 3 up link stations which are again spread around the world This data is used to correct the satellite clocks and to update their data on the orbits of all
4. successive messages Clock precision 8 bit signed integer representing the precision of the system clock GPS is having clock precision of 1 us I microseconds 0 000001s Operator s Manual Page 10 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 Root Delay Total roundtrip delay to the reference clock in NTP short format Root Dispersion Total dispersion to the reference clock in NTP short format Reference clock id 32 bit code identifying the particular server or reference clock GPS Global Positioning System Reference clock update time Time when the system clock was last set or corrected in NTP timestamp format Originate timestamp Time at the client when the request departed for the server in NTP timestamp format Receive timestamp Time at the server when the request arrived from the client in NTP timestamp format Transmit timestamp Time at the server when the response left for the client in NTP timestamp format Seconds Fraction NTP Short Format 31 32 63 Vv NTP Timestamp Format NTP Time Formats To configure PC as a NTP client please refer document m05 om 101 1 Appendix C document OR You can Access Procedure for configuring Windows XP using NTP server on the link http support microsoft com Operator s Manual Page 11 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05
5. 0 or 1 CRLF 2 15 16 Non printing character Table 4 NGTS Format The transmission sequence shall be from the Code Identification character through to the CRLF with the most significant digits being transmitted first The message shall become automatically available at one second prior to the clock minute epoch 3 6 3 T Format The settings for this format are programmable The full data message of T format shall consist of 21 printable characters with a concluding CRLF as follows Description Number of Character Range of Characters Position Value Information Code Identification 1 1 Capital T Divider 1 2 Year in Century 2 3 4 0 to 99 Divider 1 5 Month 2 6 7 1 to 12 Divider 1 8 Day of Month 2 9 10 1 to 31 Divider 1 11 Day of Week 1 12 1to7 Divider 1 13 Hours 2 14 15 0 to 23 Operator s Manual Page 13 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 Divider 1 16 Minutes 2 17 18 0 to 59 Divider 1 19 GMT Marker 1 20 Oori Validity Marker 1 21 Oori CRLF 2 22 23 Non printing character Table 5 T Format 4 INSTALLATION Each GPS masTER CLOCK is shipped with the following e GPS masTER CLOCK Model MC I time source with Regular outputs User Manual This Document Timing 3000 GPS antenn
6. A logical 0 For IRIG B each one of these codes is 10 ms long which is 10 cycles for the modulated format There are 100 possible codes per time frame although not all of them are used The code sequence is shown in Table 1 and the waveforms shown in Figure 2 The day number starts at 1 on the first of January The output voltage of the modulated waveform is 3 V peak to peak into a 50 ohms load The dc level output is TTL standard and the rising edge of the pulse is On Time 1 kHz modulated IRIG B signal is connected to BNC on the rear panel of the device IRIG B TTL level signal is connected to a BNC connector on the rear panel of the device Position Type Item Digit Position Type Item Digit 0 Reference Mark 27 to 28 Logical 0 1 Signal Seconds 1 29 Reference Mark 2 Signal Seconds 2 30 Signal Day 1 3 Signal Seconds 4 31 Signal Day 2 4 Signal Seconds 8 32 Signal Day 4 5 Logical 0 33 Signal Day 8 6 Signal Seconds 10 34 Logical 0 7 Signal Seconds 20 35 Signal Day 10 8 Signal Seconds 40 36 Signal Day 20 9 Reference Mark 37 Signal Day 40 10 Signal Minutes 1 38 Signal Day 80 11 Signal Minutes 2 39 Reference Mark 12 Signal Minutes 4 40 Signal Day 100 13 Signal Minutes 8 41 Signal Day 200 14 Logical 0 42 to 48 Logical 0 15 Signal Minutes 10 49 Reference Mark 16 Signal Minutes 20 50 to 58 Logical 0 17 Signal Mi
7. HyperTerminal and GPS masTER CLOCK differ temporarily Hence the communication stops for a while To restart the configuration follow steps 2 and 3 of the SBxx and now set the parameters of the HyperTerminal same as the default condition of the GPS masTER CLOCK Now follow steps 6 and 7 of the SBxx This command will reset the GPS masTER CLOCK To Reset the receive buffer This will erase all the data written in the buffer Suppose that the initial LCD conditions are 12 Hour mode UTC Event is in 1 Minute mode The format available on COM is by default T format The configuration steps to display time in 24 Hour mode UTC trigger the event at per hour rate to change COM2 format to NGTS to set the time zone of India and to set the password to INDIA are explained below The Local time of India is set 5 Hours and 30 Minutes ahead of the UTC H command can be used to view other parameters applicable values CONFIG ENTER PASSWORD PASSWORD OK ENTER COMMAND TO CONFIGURE PARAMETER H FOR HELP MENU L FOR PRESENT SETTINGS Z FOR TIME ZONE SETTINGS L PRESENT SETTINGS COMMAND MODE NAME VALUE x MEANING STx Hour Mode 2 24 Hour Mode SBx Baud Rate 96 9600 Baud Rate SPx Parity 0 Parity None SSx Stop Bit 1 1 Stop Bit Operator s Manual Page 31 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 SUx Time Format 1 UTC time Tx Transmit Mode 1 NGTS Mode E
8. RS 232 communication the user needs to follow the below listed commands 1 The unit will enter the configuration as soon as it will receive CONFIG command followed by an Enter 2 Once the configuration mode is entered the unit will stop sending time frames on COM2 3 Any pressing of Enter if not followed by any command will put the unit out of configuration mode and the time frames will start getting transmitted from COM2 again 4 In case of improper entry of command following message will appear on the screen INVALID COMMAND TO SET DEFAULT CONFIGURATION PRESS D TO CONTINUE PRESS ENTER This command lets the user to enter in the configuration mode Once writing CONFIG and pressing Enter key will stop the display of the T format data and will ask the user to enter the password as shown below T0701022120401 T0701022120501 CONFIG ENTER PASSWORD _ There are two passwords for GPS masTER CLOCK One is user defined password which can be changed by the user By default this password is MASIBUS Another is Immortal Password that cannot be changed by any user and it kept confidential to Masibus Service Engineers Users are asked to change the user defined password Operator s Manual Page 23 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 Enter the correct password and press Enter As a result it will ask the user to e
9. Statement Operator s Manual masibus Jan 25 2011 Issue No 07 COMMAND to set default IP address Subnet mask amp Gateway Page 2 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 1 INTRODUCTION Masibus GPS masTER CLOCK has been developed to address key power and process industry timing requirements Whether it s the monitor control or analysis of the power system the GPS masTER CLOCK is the cost effective GPS time synchronization solution To begin with the GPS masTER CLOCK offers superb timing accuracy 1us to UTC Using GPS satellites it generates extremely accurate output pulses and time codes in multiple formats The GPS masTER CLOCK synchronizes a wide variety of microprocessor based power system equipment including SCADA systems remote terminal units RTUs protection relays sequence of event recorders digital fault recorders tariff meters Slave Display Units Data Loggers and other Intelligent Electronic Devices IEDs Being a Field programmable device using HyperTerminal a very common application in Windows the GPS masTER CLOCK allows the user to alter the settings or choose from Time codes The serial port COM2 RS232 is provided for that purpose Each output can feed directly to different areas through electrically isolated ports which ensure reliable operation in a harsh substation environment The GPS masTER CLOCK generates
10. Time Feb 7 2036 06 28 18 2679 UTC originate Time Stamp Feb 7 2036 06 28 18 2679 UTC Receive Time Stamp Oct 15 2009 11 33 29 3930 UTC Transmit Time Stamp oct 15 2009 11 33 29 3930 UTC Above figure shows the example of NTP packet transmitted containing different parameters Operator s Manual Page 9 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 3 4 3 NTP Packet format 0 8 16 24 31 Root Delay 32 Reference Timestamp 64 Originate Timestamp 64 Receive Timestamp 64 Transmit Timestamp 64 NTP Message Header Above figure shows the NTP packet header format Following is the description of each parameter in NTP Packet leap 2 bit integer warning of an impending leap second to be inserted or deleted in the last minute of the current month coded as follows 0 no warning 1 last minute of the day has 61 seconds 2 last minute of the day has 59 seconds 3 alarm condition the clock has never been synchronized version 3 bit integer representing the NTP version number mode 3 bit integer representing the mode with values defined as follows 4 server Peer clock stratum 8 bit integer representing the stratum with values defined as follows O unspecified or invalid 1 primary server e g equipped with a GPS receiver 2 255 secondary server via NTP Polling interval 8 bit signed integer representing the maximum interval between
11. message COM1 Pin 2 Serial Receive Pin 3 Serial Transmit NMEA Output Pin 4 1 PPS Pin 5 Ground 9 pin D type RS 232 Standard NGTS or T FORMAT message COM2 Input Local PC configuration COM2 can be programmed to give different output formats if required Pin 2 Serial Receive Pin 3 Serial Transmit NGTS T Format Output Pin 4 1 PPS for T Format 1 PPM for NGTS Pin 5 Ground Event Programmable output Assigned as isolated event it is an isolated event through a static relay this event is indicated by the EVENT LED Terminal strip WATCHDOG Alarm output when firmware is not working properly POWER Alarm output when there is a power failure GPS LOCK Alarm output when there is a GPS sync loss Event 1 Additional Programmable output Event 2 Additional Programmable output Terminal Event 3 Additional Programmable output Strip 2 Event 4 Additional Programmable output BNC TTL Pulse 1pps signal BNC AM Signal 1 kHz IRIG B Modulated Signal BNC TTL String IRIG B DC Shift Signal RJ 45 Ethernet SNTP Output NTP Output Operator s Manual Table 6 Available Time Outputs Page 19 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 5 CONNECTION DIAGRAM per Minute per Hour Time Display Unit Any Device to Be Switched i 3000 SER Sequence of Events Recorder BUC BHC H to BHC Co ax ca
12. telnet sibe g Now Office Document D Network Setup Wizard board systems online services and hast compute S New Connection Wizard either a modem or a rial modem cable g Open Office Document T Remote Desktop Connection Sex Program Access ard Deal Meets ere RAND VER windows Catalog 49 Program Compatiblty Wizard o Windows Update t Synchronize PIS Code Visual to Flovichaet Bl visio Standard E Code visual to Flowchart gt ED Crystal and C v Pro Windows XP Fig 7 Path of HyperTerminal The cable requirement for the GPS masTER CLOCK configuration is shown in figure 8 Connect one end of the cross cable to the COM2 of the GPS masTER CLOCK and other end to an available serial port on your local PC Operator s Manual Page 21 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 Open the HyperTerminal and start new connection on COMx of your PC x can be any available serial RS232 port number In using HyperTerminal it is recommended to select File Properties Settings and set Emulation to ANSI to avoid auto detect making unwanted changes to the settings RS 232 MALE TO FEMALE CABLE CONFIGURATION Function Rx se TX FX Rx Signal ground E o 2 a ea e To COMx of To COM2 of COMPUTER GPS masTER CLOCK Fig 8 Cable requirement for configuration The port settings in HyperTerminal and the COM2 po
13. with terrestrial standard radio frequency transmissions Introduction to GPS The Global Positioning System was developed by the United States Department of Defense with the object of making it possible with suitable equipment to find the position of a receiver in terms of latitude longitude and height with a high degree of accuracy A system which can do this provides a universal means of aerial navigation The principle is very simple although the implementation uses a great deal of modern technology If one considers Figure 1 which shows a flat plane X and Y are two known fixed points on the plane P is an unknown point If the distances PX and PY can be measured then the position of point P can be calculated Actually there is an ambiguity in that point P would also fit the measurements This can be resolved if the position of a third fixed point Z is known since PZ is different to P Z This can be summed up by saying that the unknown point P lies at the intersection of three circles based on the known points X Y and Z Figure 1 The Basis of GPS Operator s Manual Page 34 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 When the plane becomes three dimensional spaces the circles become spheres The intersection of two sphere is a circle and the intersection of three spheres is a pair of points analogous to the points P and P of the flat plane case
14. 50 Of Interval 1000 COMMAND COMPLETE ENTER COMMAND TO CONFIGURE PARAMETER TO CONTINUE PRESS ENTER L PRESENT SETTINGS COMMAND MODE NAME VALUE x MEANING STx Hour Mode 2 24 Hour Mode SBx Baud Rate 96 9600 Baud Rate SPx Parity 0 Parity None SSx Stop Bit 1 1 Stop Bit SUx Time Format 1 UTC time Tx Transmit Mode 1 NGTS Mode Ex Event Mode 2 Minute Mode ET1 Addi Eventi 00000002 Second Mode ET2 Addi Event2 00000001 Second Mode ET3 Addi Event3 00000001 Second Mode ET4 Addi Event4 00000001 Second Mode EW1 Event1 ON Time 00001000 m second Mode EW2 Event2 ON Time 00000200 m second Mode EW3 Event3 ON Time 00000200 m second Mode EW4 Event4 ON Time 00000200 m second Mode ENTER COMMAND TO CONFIGURE PARAMETER OR PRESS ENTER TO CONTINUE APPENDICES Need of Accurate Time Most days as we go about our business we look at our watches ten or more times in order to check The Time Our measurement of time has two components the unit the second by which we specify the duration of events and the reference point which enables us to use time in a general way For example Greenwich Mean Time GMT is based on observations of the transit of the sun in the sky at midday at Greenwich Scientists need a much more accurate method of measuring and synchronizing time than this method This led quite early in the history of radio to the establishment of standard frequency radio transmissions which continue to the present Since frequenc
15. Antenna cable 3 meters RS 232 cable and 10 meters RG58 Co axial cable Operator s Manual Page 3 of 36 GPS masTER CLOCK Model MC I Doc Ref No m05 om 101 masibus Jan 25 2011 Issue No 07 2 SPECIFICATIONS Fig 1 GPS masTER CLOCK RECEIVER CHARACTERISTICS Timing Accuracy 2 ns in the presence of Selective Availability SA and tracking of 12 satellites Positioning Accuracy lt 25m SEP without SA Receiver Input 1575 42 MHz L1 C A Code Tracking 12 parallel channels Acquisition Time Hot Start x25 s Warm Start 50 s Cold Start lt 200 s Memory Backup Internal 5 mAh cell Sufficient for 2 weeks of backup time Needs 24 36 hours run for full charging Antenna L1 GPS 25 dB Gain RG8 58 9913 Cable Maximum length 100m In noise free environment with LMR400 1 PPS 1 ps Accuracy with GPS locked TTL into 50 Q Rising Edge on time Rise Time lt 15 ns 200 ms Pulse Width Rear Panel BNC Female Maximum Distance 10 meters Isolation of 2000 MQ at 500 VDC from all other ports Serial NMEA 0183 GPRMC on COM 1 NGTS T Format on COM 2 9600 8 N 1 on parameters COM1 4800 9600 7 8 N E O 1 2 on COM2 Isolation of 2000 MQ at 500 VDC from all other ports DB9 Female Connectors Maximum Distance of 50 mts OPTIONAL OUTPUTS FIXED OUTPUTS Pulse Operator s Manual Event One Event per minute or per hour 350 DC 120mA maximum 8
16. D on the front panel of the GPS masTER CLOCK displays time as either UTC or IST and 12 Hour 24 Hour mode The commands to set these modes are as explained below Operator s Manual Page 28 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 Suppose that initially the display is in 12 hour mode The command to change it to 24 hour mode will be ST2 If the hour mode were 24 initially then the command to convert it in 12 hour mode will be ST1 This command is used to select the displayed time from UTC or Local Time There is a predefined time zone offset of any country s Local time wrt the UTC The selection of local time using this command will add the offset to the GMT for display on the LCD as well as in the T format and NGTS frame The offset is entered by the user using Z command that is explained later The commands for selection of UTC or Local Time are SU1 UTC Time SU2 LOCAL Time The COM2 of GPS masTER CLOCK allows the time format in two different ways NGTS format and T format These formats are already explained before These commands are T1 NGTS mode T2 T format mode Remember that T format sends the time frame each second while the NGTS sends the time frame each minute The relayed event signal is available at the terminal strip on the rear panel of the GPS masTER CLOCK This signal triggers relay either every minute or every hour based on the config
17. N Time min 200 milliseconds and max 50 of period time set for particular event Event contact capacity 350 DC 120mA maximum Isolation 2000 MQ at 500 VDC from all other ports INTERFACE Display 99x24 mm 2x16 LCD with Backlit Displayed data Time of Day HH MM SS Day of week Date DD MM YY Latitude Longitude Height Number of satellites available Data Format on COM2 Parameters of both serial ports GPS status information Status LED Power Red PPS Red Event Red Watchdog Red GPS Locked Green Programming Using HyperTerminal in a local PC via COM2 Programmable parameters e Global Time zone correction e 12 24 Hrs Format of Time e COM2 serial port setting e COM2 data format selection NGTS or T FORMAT e Duration of Programmable repetitive event generation output via dry contact Per Minute or Hour e Password Protection Network Settings e IP address Subnet mask Gateway configurable through Telnet remote login e All network configurations are password protected Page 5 of 36 GPS masTER CLOCK Model MC I Doc Ref No m05 om 101 POWER SUPPLY masibus Jan 25 2011 Issue No 07 Humidity 90 at 40 C Non condensing Conducted amp Radiated Noise Tested immunity to 10 KV Ignition Transformer Noise AC 90 to 260 V 47 440 Hz 1p DC 110 340 V Power Consumption 15W Compliance FCC B CISPR22 B EN55022 B VCCI B
18. Way Terminal Strip Suitable Electric Wire 2214 AWG Isolation of 2000 MQ at 500 VDC from all other ports Alarms Page 4 of 36 GPS masTER CLOCK Model MC I Doc Ref No m05 om 101 Three Isolated Dry Contacts to 230 V AC 10 A 1 GPS Lost 2 Watchdog 3 Power Fail 8 Way Terminal Strip Suitable Electric Wire 22 14 AWG IRIGB TTL Serial Code with DC Level Shift TTL into 50 Q Rise Time 15ns Rear Panel BNC Female Maximum Distance 10 meters Isolation of 2000 MQ at 500 VDC from all other ports IRIGB Modulated 1 KHz AM Signal 3 1 Modulation Ratio 0 10Vpp Unloaded 0 3 Vpp 50 Q load Rear Panel BNC Female 150 Q Output Impedance Isolation of 2000 MQ at 500 VDC from all other ports Ethernet Output Time Synchronization protocols NTP SNTP Server Factory settable NTP Network Time Protocol All versions compatible TP RFC 1059 RFC 1119 RFC 1305 SNTP RFC 1361 Network Protocol OSI Layer4 Transport layer UDP Internet protocol IPv4 Modes Server Broadcast Protocol Time format UTC Protocol standard Universal Time Output port Rear Panel RJ 45 Network Interface 1 x 10Mbps Isolation of 2000 MO at 500 VDC from all other ports Additional Event Outputs Four independent configurable Event outputs Individual configurable time period and pulse ON time through COM2 Time Period 1 to 86400 seconds 24 Hr max Operator s Manual masibus Jan 25 2011 Issue No 07 O
19. a Antenna Mounting Kit 10 meters LMR 195 Antenna Cable with N to BNC connectors 19 Rack mounting plate and fasteners 3 meters RS 232 Interface cable Male to Female 10 meters RG 58 Co axial cable with BNC Male Connectors masTER SYNC Software for PC Synchronization The GPS masTER CLOCK is designed to be mounted in a 19 inch rack but may be used on a bench The unit is attached with to the rack mount via four screws in the four corners of the front panel The device should be installed inside a control room or suitable place without directly effected by the changing of the condition of the weather The environment temperature should meet the requirement of the device The Antenna should be located in a position with as clear a view of the sky as possible over as wide an angle as possible An absolute minimum is for it to have a view of 90 of the sky It should be mounted at least 0 5m clear of near by walls or other objects The antenna should also be mounted in a Lightning protected zone as far as is possible In practice this means ensuring that there is at least one other ground bonded structure located in the same rooftop area e g lightning rod that reaches significantly higher than the top of the GPS antenna The GPS antenna should be mounted so that it lies within a 45 degree angle skirt from the top of the other ground bonded structure The GPS antenna mount itself should also be securely bonded directly to the buildi
20. a wide range of timing signals via six output ports The GPS masTER CLOCK is defaulted with two serial ports a 1 PPS Port 1 RJ 45 NTP port and four relay outputs A fixed serial port provides NMEA 0183 GPRMC format data Second serial port is configurable for either NGTS or T format Another fixed output provides a very accurate pulse per second with accuracy of 1us to UTC Optional outputs include an IRIG B DC Level Shift an IRIG B Amplitude Modulated AM time code signals and 4 additional event outputs Time synchronization protocol NTP standard as Server Broadcast mode implemented in GPS to provide time synchronization to different slaves supporting NTP protocols All GPS masTER CLOCK units feature a front panel display giving both installation teams and users visual feedback about the time data being generated on the outputs LED indicators provide at a glance status information The optimized Receiver Antenna system employed in the GPS masTER CLOCK provides time information from the GPS satellite constellation Dynamic T RAIM processing is used to eliminate any aberrant satellite signals from the timing solution The result is timing precision on all outputs with accuracy similar to that normally seen only in laboratory instruments The GPS masTER CLOCK unit occupies the size of 19 x 12 x 3 5 It is supplied complete with all hardware and software required for the installation including the Antenna Antenna mounting kit 10 meters
21. ator s Manual Page 8 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 3 4 2 NTP GPS time protocol is transmitted via RJ 45 connector on UDP layer RFC 768 at 10 Mbps provided on rear panel of GPS GPS transmits NTP packets in various optional modes i e Server Server Broadcast depending on the applications of client module NTP packets involve the timestamp value according to UTC Universal Time time Server mode GPS responses with current timestamp when the query is received from client Broadcast mode GPS broadcasts the NTP packet at fixed intervals to clients Note a NTP Version Mode value in NTP packet is factory set b Network IP Subnet Mask and Gateway of GPS can be changed through Telnet Refer document m05 0m 101 3 Appendix E for configuring GPS master clock as Telnet Server C Refer document m05 0m 101 1 Appendix C for configuring Windows XP PC as NTP Client d Refer document m05 0m 101 1 Appendix D for configuring Unix PC as NTP Client m Network Time Protocol amp Flags Ox1c asl esses 2 sada al Version number NTP Version 3 3 Leap Indicator no warning C0 100 Mode server 4 Peer Clock Stratum primary reference 1 Peer Polling Interval 14 16384 sec Peer Clock Precision 0 000001 sec Root Delay 0 0000 sec Root Dispersion 0 0000 sec Reference Clock ID Global Positioning Service Reference Clock Update
22. before writing any command operator has to enter CONFIG and password again Any pressing of Enter instead of command will result in a jump out of the configuration mode H command will show the various possible values applicable to be entered for the particular parameter The HELP is displayed below H FOR HELP MENU L FOR PRESENT SETTINGS Z FOR TIME ZONE SETTINGS H GPS MASTER CLOCK SYSTEM Version No 101 UART commands STx Set hour mode to 12 or 24 For Display set it to 12 hour mode set it to 24 hour mode Set baud rate 4800 baud rate 9600 baud rate Set parity bit parity bit set to none parity bit set to odd parity bit set to even Set stop bit stop bit set to 1 stop bit set to 2 Set UTC OR IST time default set to 2 UTC time LOCAL time Show help test Set transmit mode ngts mode t format mode Set Event mode minute mode hour mode P password To change password max upto 9 character R Reset the controller D Set to Default Setting ETHO Set to Default Network Settings ESC ETx Operator s Manual Reset the receive buffer To configure additional Events Page 25 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 EWx To configure additional Events ON Time ENTER COMMAND TO CONFIGURE PARAMETER OR PRESS ENTER TO CONTINUE Note a Para
23. ble IG B GPS ntenna COM COMI L 1 PS NTP EVENTIEVENT2 EYENT3EYENT4 POWER ost EV GPS masTER CLOCK RS232 RS232 CONNECTOR CONNECTOR HMEA FORMAT NGTS T FORMAT OR PROG TO COMPUTER SERIAL PORTS EYENT OUTPUTS Fig 6 Connection Diagram with additional Event Outputs Operator s Manual Page 20 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 6 USER CONFIGURATIONS GPS masTER CLOCK offers facility to the users for configuring communication parameters of serial port COM2 Time format Option of COM2 Display Format on LCD as well as Event Mode The communication parameters include baud rate number of stop bits and parity The user is free to choose either NGTS or T Format on COM2 The LCD Display Format includes Hour Mode and Time Format UTC IST The Event Mode can be either one event per minute or per hour The user can enter the time offset of the time zone where the unit is to be installed e The user can change IP address Subnet Mask amp Gateway of GPS master clock Configuration requires a standard 9 way D type RS 232 cable and standard communication software in the PC such as HyperTerminal HyperTerminal is available in every Windows based PC on the link shown in figure 7 pa BE pa CERENKET LEID seal Network Connections IGA Ertas ainoat mmm Connects to other computers internet
24. d GPS antenna the device is ready to be switched on As soon as power is switched on the green LED POWER will be lit The LCD display will also be lit and display some message as shown in figure 5 a to 5 d The first screen of the LCD display is the name of manufacturer Figure 5 a The second screen is the message for settings of two serial communication ports The third screen is name of the device and the message Connecting will be displayed until the device locks with the GPS receiver signal This may be as long as a few minutes For the first time when the device is switched on the exact location will not be available for 2 15 minutes after the GPS has locked This will depend on the duration the device has been switched off and the distance the device has been moved After the device is locked with satellite signals the green LED GPS LOCKED will be lit The LCD display will restore to normal display situation The normal display screen shown as in Figure 5 d Operator s Manual Page 16 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 Three alarm contacts are available on the connector block They can be used to indicate operation of the instrument to any remote device The alarm contacts are all dry contacts with ratings as detailed in the specification They are all in open positions when the system is working correctly and closed in th
25. e event of a failure The events covered are a No power to the instrument b Watchdog failure i e firmware problem c GPS not locked Alarm a can be checked by switching the instrument off and checking that the contact closes Alarm b cannot be checked on site and alarm c should give an alarm when the instrument is first switched on before the clock synchronizes Operator s Manual Page 17 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 MASIBUS AUTO 8 INSTR PVT LTD Figure 5 a COM 1 9600 N 8 1 COM 2 9600 N 8 1 Figure 5 b GPS masTER CLOCK CONNECTING Figure 5 c TIME 12 00 OO DATE 01 O1 O7 Figure 5 d Figure 5 A wide range of time related output signals are available from this instrument to suit a wide range of possible applications To complete installation of the instrument all that remains is to couple the required outputs to the associated equipment taking due account of permitted signal output levels as detailed in the specification section Operator s Manual Page 18 of 36 GPS masTER CLOCK Model MC I Doc Ref No m05 om 101 The following is a summary of masibus Jan 25 2011 Issue No 07 the signals available from the various terminals and sockets Connector Signal Description 9 pin D type RS 232 NMEA format
26. ecorders DFR II Sequence of Event Recorders SER III Supervisory Control and Data Acquisition Systems SCADA Operator s Manual Page 35 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 IV Power Line Fault Detection using Time Domain Reflectometer V Integrated Alarm Management Systems This product is checked and supplied in accordance with our published specifications and used in normal or prescribed applications and within the parameters set for mechanical and electrical performance The product will not cause danger or hazard to health or safety provided that normal engineering and safety practices are observed and the product is only used by trained and qualified persons All usage of this product must be in accordance with this manual If there is any doubt about any aspect relating to the correct use of the product please contact Masibus Automation amp Instruments P Ltd B 30 GIDC Electronics Estate Gandhinagar 382044 Gujarat India Telephone 00 91 79 23287275 Fax 00 91 79 23287281 This operators manual is published by Masibus Automation amp Instruments P Ltd for use with the GPS masTER CLOCK instrument described herein Masibus Automation 4 Instruments P Ltd reserves the right to revise this manual without notice for any reason This includes but is not limited to the utilization of advances in technology and changes in the i
27. he steps 2 and 3 of SBxx command Now correct the parameter to match with desired set ones In this case take care of changing the databits to 7 when the parity is either even or odd After setting the parity in this setting window follow the steps 5 and 6 of the SBxx command The time data will again reappear You can check present settings using L command The number of stop bits in the serial communication can be set as 1 or 2 using this command The options are simply two SS1 One stop bit SS2 Two stop bits The steps to follow are same as SBxx and STx command This command is to enter the time offset of any particular location with reference to the UTC Every country has some time zone offset in its local time wrt the UTC The table of the time zone can be found from Internet The following is the example of the entering a time zone Remember that the time zone will put its direct effect of the IRIG B signal while it will affect the NGTS and T frames only if the unit is set in the LOCAL TIME DISPLAY mode using the SUx command as explained further Time zone offset value should be between time ranges of 12 00 to 12 00 Time offset value apart from above range will be considered as INVALID command Z ENTER THE TIME ZONE OFFSET ADDED WITH THE DAY LIGHT SAVING TIME IF APPLICABLE FORMAT HH MM ENTER NOW 02 00 COMMAND COMPLETE ENTER COMMAND TO CONFIGURE PARAMETER TO CONTINUE PRESS ENTER The 2x16 LC
28. meter S To save Parameters is not used as it it reserved for future use The communication commands change the parameters of serial communication port of the GPS masTER CLOCK These include SBxx SPx and SSx These commands first change the configuration of COM2 of the GPS masTER CLOCK hence for the moment the communication between the unit and HyperTerminal stops To reinitialize the communication first disconnect the link enter into the settings of the HyperTerminal and set it same as the present setting of GPS masTER CLOCK Again connect the link 1 Suppose that the desired baud rate is 4800 the command should be SB48 See H HELP This will display following on the HyperTerminal ENTER COMMAND TO CONFIGURE PARAMETER OR PRESS ENTER TO CONTINUE SB48 Now the communication must have stopped 2 Disconnect the link by a right click on Call disconnect pop HyperTerminal Fie Edit view Call Transfer Help po 5 NG T Disconnect 3 Enter the settings by following the path File Properties Connect To Configure Operator s Manual Page 26 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 pop Properties gps HyperTerminal DUM Edt Wew Cal Transf CONECTO Settings New Connection pop COM Properties C untw tegion jodie 197 Poit Setlinas Page Setup Print Enter the area code wi
29. ng protection ground and not connected via any other grounded structures The mounting kit can be fastened to wall or fitted to the pipe using the screws supplied The antenna should be first placed through the hole of the mounting kit and then the antenna cable should be fitted The antenna erection at right angle wrt the ground is a must Operator s Manual Page 14 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 The cable used must be with sufficient shielding If the shielding is not sufficient the cable should not be in close proximity to power or other RF cables carrying transmitter signals in particular parallel runs are to be avoided if possible If such runs are absolutely unavoidable a minimum separation of 30 cm may be used as a guideline The GPS receiver embedded in the GPS masTER CLOCK has excellent OOB rejection characteristics as does the antenna itself However sound engineering practice should not rely on these factors alone to guarantee performance Careful installation will enhance the long term reliability and on going stability of the GPS masTER CLOCK The maximum length of the cable is 100 meters when the LMR400 or Belden 9913 cable is used If the distance to be carried The installation of GPS masTER CLOCK is very simple Follow these steps e Connect GPS receiver antenna The antenna should be at sufficient height and in open surrounding
30. nstrument or its configuration Liabilities for difficulties arising from unknown or unforeseen technical limitations are disclaimed Operator s Manual Page 36 of 36
31. nter any command to configure the parameters This is shown below ENTER PASSWORD PASSWORD OK ENTER COMMAND TO CONFIGURE PARAMETER H FOR HELP MENU L FOR PRESENT SETTINGS Z FOR TIME ZONE SETTINGS ENTER PASSWORD WRONG PASSWORD TO CONTINUE PRESS ENTER T0701022120501 To enter into the configuration mode again write CONFIG and enter correct password On writing L it will display the present settings of the parameters of GPS masTER CLOCK H FOR HELP MENU L FOR PRESENT SETTINGS Z FOR TIME ZONE SETTINGS L PRESENT SETTINGS COMMAND MODE NAME VALUE x MEANING STx Hour Mode 2 24 Hour Mode SBx Baud Rate 96 9600 Baud Rate SPx Parity 0 Parity None SSx Stop Bit 1 1 Stop Bit SUx Time Format 1 UTC time Tx Transmit Mode 1 NGTS Mode Ex Event Mode 1 Minute Mode ET1 Addi Event1 00000001 Second Mode ET2 Addi Event2 00000001 Second Mode ET3 Addi Event3 00000001 Second Mode ET4 Addi Event4 00000001 Second Mode EW1 Event1 ON Time 00000200 m second Mode EW2 Event2 ON Time 00000200 m second Mode EW3 Event3 ON Time 00000200 m second Mode EW4 Event4 ON Time 00000200 m second Mode Operator s Manual Page 24 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 ENTER COMMAND TO CONFIGURE PARAMETER OR PRESS ENTER TO CONTINUE The H command will list all the commands to configure GPS masTER CLOCK If the user presses the Enter key
32. nutes 40 59 Reference Mark 18 Logical 0 60 to 68 Logical 0 19 Reference Mark 69 Reference Mark 20 Signal Hours 1 70 to 78 Logical 0 21 Signal Hours 2 79 Reference Mark 22 Signal Hours 4 80 to 88 Logical 0 23 Signal Hours 8 89 Reference Mark 24 Logical 0 90 to 98 Logical 0 25 Signal Hours 10 99 Reference Mark 26 Signal Hours 20 Table 1 IRIG B Code Sequence Operator s Manual Page 7 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 Reference Logical 0 FIG 2 IRIG MODULATED SIGHAL 3 4 1 Introduction NTP Network time protocol is a common method for synchronization of hardware clocks in local and global networks The software package NTP is an implementation of the actual version 3 Mills90 based on the specification RFC 1305 from1990 directory doc NOTES Other NTP compatible Versions are NTPvi RFC 1059 NTPv2 RFC 1119 RFC 958 GPS is being provided with Internal protocol based Universal time synchronization protocol i e SNTP Simple Network Time Protocol NTP Network Time Protocol used to synchronize the various clocks of NTP clients to adjust with universal time SNTP uses the standard NTP timestamp format described in RFC 1305 Network Time Protocol is widely used to synchronize the time for Internet hosts routers and ancillary devices to Coordinated Universal Time UTC as disseminated by national standards laboratories Oper
33. om 101 Issue No 07 The additional four event signals are available at the terminal strip on the rear panel of the GPS masTER CLOCK User can configure these relays through COM for time ranging from 1 to 86400 seconds individually for separate event outputs User can configure their Time period as well as their ON time through COM port Time Period limit 1 to 86400 seconds O values are to inhibit stop particular event output ON time limit 200 milliseconds min to 50 max of particular event time period Ensure that ON time value of all additional events are to be entered in milliseconds If time period is O the ON time will be also O by default Whenever the new time period is set the new event timing counter will start from the very next minute and the contact will be energized after the settable time for that particular event Please ensure to switch power of the instrument OFF and ON once if the event time period settings are changed There are two RS232 serial ports equipped within the device These two serial ports use two separate high performance chips to get electrical isolation Each serial port has its own format of the timing strings On serial port one 9 ways D type socket the message is NMEA SGPRMC format The serial port two 9 way D type plug the message is NGTS or T FORMAT RMC RECORD FORMAT The SGPRMC sentence contains time and date of position fix speed and course information The following examples sho
34. onal Event4 This command is used to configure ON Time of Additional Events These Events can be configured to stay ON for a minimum 200 millisecond to 50 of its period These configuration commands are listed below EW1 Eventi ON Time EW2 Event2 ON Time EW3 Event3 ON Time EW4 Event4 ON Time NOTE a Please ensure that the instrument should be power switch OFF ON after changing the event time settings ee This command is used to set default network settings of GPS masTER CLOCK Default network settings are IP Address 192 168 100 153 Subnet Mask 255 255 255 0 Gateway 192 168 100 1 The user is allowed to change one password The command for changing password is P password The default password is MASIBUS Suppose user wishes to change it to INDIA then the command will be PINDIA Remember that the password should not exceed 9 characters If you try to keep a password that has more than 9 characters the system will show an error Invalid Command and the previous password will be retained Operator s Manual Page 30 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 The Immortal Password LAMBDA cannot be changed Other available commands are as follows To set the parameters to default state i e 9600 8 N 1 When you try to enter in the default condition from some other condition the communication parameters of the
35. ower supply fuse is also present at the rear panel o ANTENNA is used for connection of the GPS receiver antenna o COMI is a 9 way D type socket and the time message is NMEA GPRMC format on this serial communication port o COM2 is a 9 way D type plug and the time message is standard NGTS or T FORMAT on this serial port o There are also three BNC connectors on the rear panel One with label 1PPS is the TTL level output of one pulse per second signal One with label IRIG B TTL is the dc level shift IRIG B signal output One with label IRIG B MOD is the modulated 1 KHz IRIG B signal output o NTP is RJ 45 female Ethernet connector provides NTP Ethernet output for synchronization of NTP clients with GPS o Three pairs of alarm contacts are located between terminals 1 and 2 terminals 3 and 4 terminals 5 and 6 respectively They are assigned as WATCHDOG POWER FAIL and GPS LOST accordingly o Optional output There are 4 additional event outputs contacts EVENT1 EVENT2 EVENT3 EVENT4 provided on GPS rear terminal each with 350 VAC 120mA max capacity On first installation after about 15 days of off state the instrument may initially show incorrect time because the battery of the receiver could be discharged It is required to run the system for 24 hours continuously to completely recharge the battery and with antenna so that it can get the correct time After the connections of power supply an
36. rt of the GPS masTER CLOCK must match each other for fruitful communication The settings of COM2 of GPS masTER CLOCK are defaulted to 9600 baud 8 N 2 and may be checked by observing the LCD on boot up The settings of the HyperTerminal must be set same as that observed on LCD to initialize the communication This is shown in figure 9 and 10 In order to configure the settings first disconnect See step 2 on page 20 the communication on the HyperTerminal Once the communication parameters are set as that of GPS masTER CLOCK you will get NGTS data by default on the HyperTerminal as shown in figure 11 COM 1 9600 N 8 1 COM 2 9600 N 8 1 Fig 9 COM port Settings of GPS masTER CLOCK pop Properties gps HyperTerminal Gi Edt Wew Cal Transf CONNES TO Settings New Connection open B Save Save As Counkiyfregion li 19 Page Setup Print Enter the area cade without the long distance prefix Properties Area code Phone number Connectusng COMI i Displays the properties of the cu Operator s Manual Page 22 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 Fig 10 Configuration of Settings of HyperTerminal T0701022120101 T0701022120201 T0701022120301 T0701022120401 Fig 11 Default NGTS Data on HyperTerminal This was the journey to get time format on RS 232 To configure the
37. the satellites B The Satellites The satellites each has 4 atomic clocks are kept in synchronism with UTC via the Up links by the Master Control Station They transmit navigational signals which include the identity of system time and the almanac of satellite orbits The transmission frequency is about 1 5 GHz which means that signals are not affected by weather C The User s Receiver This must be able to simultaneously receive signals from at least 4 satellites Commercial receivers such as the GPS masTER CLOCK can deal with up to 12 signals The receiver will process the 4 strongest signals and from them it calculates the distances to the 4 satellites and hence the position of the receiver and the correction necessary to its local clock to bring it into synchronism with UTC The system is available for free All the user needs to do is provide himself with a suitable aerial and receiver Navigational user s main interest is in the positional information but as a consequence of being able to get this data a local clock is available which is synchronized with UTC to an accuracy of 1 us The GPS masTER CLOCK combines a GPS receiver with a microcomputer and buffers to provide a local time source with a variety of outputs suitable for synchronizing a wide variety of equipment The GPS Master Clock can be used wherever there is a requirement to accurately synchronize equipment Typical applications include I Digital Fault R
38. thout the long distance prefix Aracode Bis per second Phone number Nara his n Connect using COMI Displays the properties of the cu Use Gountysragiar code and ares code Stop bie 1 Parky None Flow control None 4 Set the baud rate to 4800 and check for other parameters to be same as that of the GPS masTER CLOCK 5 After setting the parameters reconnect the link by right click on Call Call pop Hyperterminal File Edit View Call Transfer Help HG 6 Now press ESC and Enter keys 7 Once the connection is reestablished the time data will again be displayed on the HyperTerminal Now without pressing Enter anymore times if you enter any of the commands listed in help you do not need to reenter the CONFIG and password Press L to check whether the baud rate change was accepted or not The change of parity configuration can be done using this command Different options for the parity settings are as below SPO No Parity 8 data bits SP1 Odd Parity 7 data bits SP2 Even Parity 7 data bits Operator s Manual Page 27 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 Same as SBxx command the communication stops as soon as you finish the command and press Enter once This is because the protocol settings at GPS masTER CLOCK and HyperTerminal do not match To correct this follow t
39. uration set by the command as listed below E1 1 Minute mode E2 1 Hour Mode The additional four event signals are available at the terminal strip on the rear panel of the GPS masTER CLOCK User can configure these relays through COM for time ranging from 1 to 86400 seconds individually for separate event outputs User can configure their Time period as well as their ON time through COM2 port Time Period limit 1 to 86400 seconds 0 values are to inhibit stop particular event output ON time limit 200 milliseconds min to 509 o max of particular event time period Ensure that ON time value of all additional events are to be entered in milliseconds If time period is 0 the ON time will be also O by default Operator s Manual Page 29 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 Whenever the new time period is set the new event timing counter will start from the very next minute and the contact will be energized after the settable time for that particular event Please ensure to switch power of the instrument OFF and ON once if the event time period settings are changed This command is used to configure Time Period of Additional Events These Events can be configured to trigger at every second to every 86400 seconds 24 hr These configuration commands are listed below ET1 Additional Eventi ET2 Additional Event2 ET3 Additional Event3 ET4 Additi
40. w the contents of a typical RMC sentence The settings for this serial format is 4800 8 N 1 The full data message of this format shall consist of data fields as follows Field Example Comments Sentence ID GPRMC UTC Time 130525 00 hhmmss ss Status A A Valid V Invalid Latitude 4250 5589 ddmm mmmm N S Indicator S N North S South Longitude 14518 5084 dddmm mmmm E W Indicator E E East W West Speed over ground 000 1 Knots Operator s Manual Page 12 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 Course over ground 245 0 Degrees UTC Date 291206 DDMMYY Magnetic variation Degrees Magnetic variation i E East W West Checksum 25 CC Terminator lt CR gt lt LF gt Non printing characters Table 3 RMC Record Selection The settings for this format are programmable The full data message of NGTS format shall consist of 14 printable characters and a concluding CRLF as follows Description Number of Character Range of Characters Position Value Information Code Identification 1 1 Capital T Year in Century 2 2 3 0 to 99 Month 2 4 5 1 to 12 Day of Month 2 6 7 1to 31 Day of Week 1 8 1to7 Hours 2 9 10 0 to 23 Minutes 2 11 12 0 to 59 GMT Marker 1 13 Oori Validity Marker 1 14
41. with no obstacles nearby Please follow the above stated guidelines e Make sure your power supply is in compliance with the specification and then connect power supply e Make the connections between time signal outputs and corresponding devices e Connect the alarm signals to respective devices e Figure 4 show the views of front panel and rear panel of the GPS masTER CLOCK device respectively GPS masTER CLOCK 1 pps EVENT WATCHDOG GPS LOCKED masibus Fig 3 Front Plate MOD TCH Antenna COM2 COMI tpIG B mum B 1PPS NTP EVENTI EYENT2 EVENT3 EYENT4 POWER Lost EVENT Doc e E ED O E olololololololol lolololololololo N L MAINS 230YAC 50HZ C2 FUSE Fig 4 Rear Plate with Event Outputs o Onthe front panel of the device there is a 2 16 characters LCD display o There are five LEDs These LEDs indicate the status of the device LED POWER is the indicator for power supply Operator s Manual Page 15 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 LED GPS LOCKED is the indicator for GPS locked LED EVENT is the indicator for event output LED 1 pps is the indicator for one pulse per second output LED WATCHDOG will be lit only when the application program has been stopped for some reason All wiring connections are located on the rear panel of the device Power supply connector and one p
42. x Event Mode 1 Minute Mode ET1 Addi Event1 00000001 Second Mode ET2 Addi Event2 00000001 Second Mode ET3 Addi Event3 00000001 Second Mode ET4 Addi Event4 00000001 Second Mode EW1 Event1 ON Time 00000200 m second Mode EW2 Event2 ON Time 00000200 m second Mode EW3 Event3 ON Time 00000200 m second Mode EW4 Event4 ON Time 00000200 m second Mode ENTER COMMAND TO CONFIGURE PARAMETER OR PRESS ENTER TO CONTINUE Z ENTER THE TIME ZONE OFFSET ADDED WITH THE DAY LIGHT SAVING TIME IF APPLICABLE FORMAT HH MM ENTER NOW 05 30 COMMAND COMPLETE ENTER COMMAND TO CONFIGURE PARAMETER TO CONTINUE PRESS ENTERST2 COMMAND COMPLETE ENTER COMMAND TO CONFIGURE PARAMETER TO CONTINUE PRESS ENTER SU2 COMMAND COMPLETE ENTER COMMAND TO CONFIGURE PARAMETER TO CONTINUE PRESS ENTER T1 COMMAND COMPLETE ENTER COMMAND TO CONFIGURE PARAMETER TO CONTINUE PRESS ENTER E2 COMMAND COMPLETE ENTER COMMAND TO CONFIGURE PARAMETER TO CONTINUE PRESS ENTER PINDIA COMMAND COMPLETE ENTER COMMAND TO CONFIGURE PARAMETER TO CONTINUE PRESS ENTER ET1 Event 1 Configuration Please enter interval Min 1 sec Max 86400 sec 2 COMMAND COMPLETE ENTER COMMAND TO CONFIGURE PARAMETER Operator s Manual Page 32 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 TO CONTINUE PRESS ENTER EW1 Event 1 ON Time Configuration Please enter interval Min 200 m sec Max
43. y is measured in cycles second these transmissions automatically provide a standard for Operator s Manual Page 33 of 36 GPS masTER CLOCK masibus Model MC I Jan 25 2011 Doc Ref No m05 om 101 Issue No 07 the second as the unit of time They also provide a time reference which is coded into the modulation of the signal With the development of very accurate clocks based on the properties of atoms it was found that the world did not rotate at a constant speed and therefore atomic clocks which depend on vibrations within atoms were adopted as the standard and Universal Co ordinate Time UTC was established as the world standard In the power generation and distribution industry synchronized time is important although the accuracy required varies with the application If one is trying to compare phase angles measured at different points in a transmission system without a direct connection using synchronized clocks it is impossible to achieve the accuracy needed to be around 50 us for 1 degree accuracy in the measurement To use synchronized clocks for fault location using traveling wave methods one needs to get 1 us accuracy Till now last two higher accuracies have been very difficult to obtain but they can now be obtained quite easily by making use of the Global Positioning System GPS This has the advantage of being available world wide and does not suffer from the signal propagation problems associated
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